java ahmed

//Escape Sequences and Comments.
public class MyProgram {
    public static void main (String[] args) {
    	System.out.println("Ahmed\tmedo");//Tab
    	System.out.println("Ahmed\bmedo");//backspace
    	System.out.println("Ahmed\nmedo");//newline
    	System.out.println("Ahmed\rmedo");//carriage return.
    	System.out.println("Ahmed\fmedo");
    	System.out.println("Ahmed\'medo");
    	System.out.println("Ahmed\"medo");
    	System.out.println("Ahmed\\medo");
    	
    	
    	}
    	
    	}
//Escape Sequences and Comments.
public class MyProgram {
    public static void main (String[] args) {
    	System.out.println("Ahmedmedo\"i love java and python\"");
    	System.out.println("Ahmedmedo\'i love java and python\'");
    	}
    	}
public class MyProgram {
	public static void main(String[] args) {
		 int x=1;
		  System.out.println(x);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		byte x = -127;//127<_>-127
		System.out.println(x);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		short x = 32767; // -32768<_>32767
		System.out.println(x);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		short x = 10; 
		System.out.println("x="+x);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		int x;//can take 2147483647 value
		System.out.println(Integer.MAX_VALUE);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		int x;// can take -2147483648 value
		System.out.println(Integer.MIN_VALUE);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		float x = 2.5f;// can take 3.4028235E38 VALUE
		System.out.println(x);
		System.out.println(Float.MAX_VALUE);
		float y=2.1234567777f;
		System.out.println(y);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		double x = 2.123456789123456f;//1.79769331348623157E308;
		System.out.println(x);
		System.out.println(Double.MAX_VALUE);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		long x = 21474836488L;
		System.out.println(x);
		System.out.println(Long.MAX_VALUE);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		char x = 'A';// take just ' '
		System.out.println(x);
		System.out.println(Char.MAX_VALUE);//error cannot be resolved to variable
    }
}
public class MyProgram {
	public static void main(String[] args) {
		boolean x=false;
		System.out.println(x);
		boolean y=true;
		System.out.println(y);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		String x = " Ahmed Abdelmoneim";
		System.out.println(x);
	}  
}
public class MyProgram {
	public static void main(String[] args) {
		byte BtoD = 0b1111111;
		System.out.println(BtoD);

	}

}


public class MyProgram {
	public static void main(String[] args) {
		 int x=1;
		  System.out.println(x);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		byte x = -127;//127<_>-127
		System.out.println(x);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		short x = 32767; // -32768<_>32767
		System.out.println(x);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		short x = 10; 
		System.out.println("x="+x);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		int x;//can take 2147483647 value
		System.out.println(Integer.MAX_VALUE);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		int x;// can take -2147483648 value
		System.out.println(Integer.MIN_VALUE);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		float x = 2.5f;// can take 3.4028235E38 VALUE
		System.out.println(x);
		System.out.println(Float.MAX_VALUE);
		float y=2.1234567777f;
		System.out.println(y);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		double x = 2.123456789123456f;//1.79769331348623157E308;
		System.out.println(x);
		System.out.println(Double.MAX_VALUE);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		long x = 21474836488L;
		System.out.println(x);
		System.out.println(Long.MAX_VALUE);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		char x = 'A';// take just ' '
		System.out.println(x);
		System.out.println(Char.MAX_VALUE);//error cannot be resolved to variable
    }
}
public class MyProgram {
	public static void main(String[] args) {
		boolean x=false;
		System.out.println(x);
		boolean y=true;
		System.out.println(y);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		String x = " Ahmed Abdelmoneim";
		System.out.println(x);
	}  
}
public class MyProgram {
	public static void main(String[] args) {
		byte BtoD = 0b1111111;
		System.out.println(BtoD);

	}

}


public class MyProgram {
	public static void main(String[] args) {
		//Arithmetic Operators.
		//Relational Operators.
		//Bitwise,Logical,Assignment,Operators.
		//Miscellaneous Operators.
	}
}
public class MyProgram {
	public static void main(String[] args) {
		int x=10;
		System.out.println("x=="+x);
   }
}
public class MyProgram {
	public static void main(String[] args) {
		System.out.println(5+6*2);//17
        System.out.println(( 5 + 6 )*2);//22
	}
}
public class MyProgram {
	public static void main(String[] args) {
		int x=(5+6)*2;  
		System.out.println(x);
	}
}
//search operators precedence in java;
public class MyProgram {
	public static void main(String[] args) {
		int x = 5 * (2 * (2 + 1));
		//2+1=3
		//2*3=6
		//5*6
		System.out.println(x);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		int x = 5 * 2 / 2;//left to right
		System.out.println(x);
	}
}
public class MyProgram {
	public static void main(String[] args) { 
		System.out.println(2%5);
		System.out.println(5%5);
		System.out.println(6%5);
		System.out.println(7%5);
		System.out.println(8%5);
		System.out.println(9%5);
		System.out.println(10%5);
    }
}
public class MyProgram {
	public static void main(String[] args) {
		int x = 2 % (5 + 5) * 3;
		System.out.println(x);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		/*byte short =short
		int int = int 
		int float = float
		float double = double 
		int float short double =double*/
	}
}
public class MyProgram {
	public static void main(String[] args) {
		System.out.println(15/2);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		System.out.println(15.0/2);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		System.out.println(15.0f/2);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		int x=9,y=2;
		System.out.println(x/y);  
	}
}
public class MyProgram {
	public static void main(String[] args) {
		int x = 9, y = 2;
		System.out.println((float) x / y);//Type casting
	}
}
public class MyProgram {
	public static void main(String[] args) {
		int x = 9, y = 2;
		System.out.println((float) x / y);//Type casting
		//Widening primitive conversions
		//Narrowing primitive conversions
	}
}
public class MyProgram {
	public static void main(String[] args) {
		int x = 9, y = 2;
		System.out.println( x / y);//Type casting
		// Widening primitive conversions
		// Narrowing primitive conversions
	}
}
public class MyProgram {
	public static void main(String[] args) {
		int x = 9, y = 2;
		System.out.println((int) x /  y);//Type casting
		// Widening primitive conversions
		// Narrowing primitive conversions
	}
}

	




public class MyProgram {
	public static void main(String[] args) {
		int x = 1;
		x++;//postfix/post(increment)
		System.out.println(x); 
		++x;//prefix/pre(increment)
		System.out.println(x);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		int x = 1;
		System.out.println("x==" + ++x);//prefix
		int y = 1;
		System.out.println("y==" + y++);//postfix
	}
}
public class MyProgram {
	public static void main(String[] args) {
		int x = 1;
		System.out.println("x=" + x++ +"*"+ ++x +"*"+ x++);
		System.out.println("x=" + x);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		int x = 1, y,z;
		y = x++;
		z=++x;      
		System.out.println("y="+y);
		System.out.println("x="+x);
		System.out.println("z="+z);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		int x=1,y;
		y=++x + x++;
		System.out.println("y=="+y);
		System.out.println("x=="+x);
	}
}

public class MyProgram {
	public static void main(String[] args) {
		int x = 1, y;
		y = (++x*2 + x++%2)/2;
		System.out.println("y==" + y);
		System.out.println("x==" + x);
	}
}
//the Assignment operators
public class MyProgram {
	public static void main(String[] args) {
		int k=5;
		k=k+10;//k+=10
		System.out.println("K=="+k);
	}
}
public class MyProgram {
	public static void main(String[] args) {
		int f=10;
		System.out.println(f);
	}
}
import java.util.Scanner;
public class MyProgram {
	public static void main(String[] args) {
		Scanner in= new Scanner(System.in);
		System.out.println("Enter number");
		int f=in.nextInt();
		System.out.println("number=="+f);
	}
}
import java.util.Scanner;
public class MyProgram {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		float n1, n2;
		System.out.println("Please enter the first number:");
		n1 = in.nextFloat();
		System.out.println("Plase enter the second number:");
		n2 = in.nextFloat();
		System.out.println("num1="+n1+"\n"+"num2="+n2);
	}
}
import java.util.Scanner;
public class Ahmedjava {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        float n1, n2;
        System.out.println("Please enter the first number:");
        n1 = in.nextFloat();
        System.out.println("Plase enter the second number:");
        n2 = in.nextFloat();
        System.out.println("num1=" + n1 + "\n" + "num2=" + n2);
        String out1 = String.format("num1=%f num2=%f", n1, n2);
        System.out.println(out1);
        // System.out.printf("num1=%.2f num2=%f",n1,n2);
    }
}
import java.util.Scanner;

public class Ahmedjava {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Enter a value s:");
        String s = in.next();
        System.out.printf("s = %s", s);
    }
}
import java.util.Scanner;
public class Ahmedjava {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Enter a value s:");
        String s = in.nextLinea();
        System.out.printf("s = %S", s);
    }
}
import java.util.Scanner;

public class Ahmedjava {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Enter a value s:");
        char s = in.next().charAt(0);
        System.out.printf("s=%s", s);
    }
}
import java.util.Scanner;
public class Ahmedjava {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n1, n2;
        System.out.println("Enter num1:");
        n1 = in.nextInt();
        System.out.println("Enter num2:");
        n2 = in.nextInt();
        System.out.println("sum=" + (n1 + n2));//not n1+n2
    }
}
import java.util.Scanner;
public class Ahmedjava {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n1, n2, sum;
        System.out.println("Enter num1:");
        n1 = in.nextInt();
        System.out.println("Enter num2:");
        n2 = in.nextInt();
        sum = n1 + n2;
        System.out.println("sum=" + sum);
    }
}
import java.util.Scanner;
public class Ahmedjava {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n1, n2, n3;
        System.out.println("Enter num1:");
        n1 = in.nextInt();
        System.out.println("Enter num2:");
        n2 = in.nextInt();
        System.out.println("Enter num3:");
        n3 = in.nextInt();
        System.out.println("Avg==" + (n1 + n2 + n3) / 3);

    }
}
import java.util.Scanner;

public class Ahmedjava {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n1, n2, n3;
        System.out.println("Enter num1:");
        n1 = in.nextInt();
        System.out.println("Enter num2:");
        n2 = in.nextInt();
        System.out.println("Enter num3:");
        n3 = in.nextInt();
        System.out.println("Avg==" + (n1 + n2 + n3) / 3);

    }
}

public class Ahmedjava {
    public static void main(String[] args) {
        int num = 10;
        if (num > 0) {
            System.out.println("positive number.");
        }
    }
}
public class Ahmedjava {
    public static void main(String[] args) {
        int num = -10;
        if (num > 0) {
            System.out.println("positive number.");
        }
    }
}
public class Ahmedjava {
    public static void main(String[] args) {
        int num = 5;
        if (num == 5) {
            System.out.println("number=5");
        }
        System.out.println("Ahmed");
        System.out.println("medo");
    }
}
public class Ahmedjava {
    public static void main(String[] args) {
        int num = 5;
        if (num == 4) {
            System.out.println("number=5");
        }
        System.out.println("Ahmed");
        System.out.println("medo");
    }
}
import java.util.Scanner;

public class Ahmedjava {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int num = 0;
        System.out.println("Enter integer number:");
        num = in.nextInt();
        if (num == 4) {
            System.out.println("number = 4");
        }
    }
}
import java.util.Scanner;

public class Ahmedjava {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int num = 0;
        System.out.println("Enter integer number:");
        num = in.nextInt();
        if (num == 4) {
            System.out.println("number = 4");
            System.out.println("Thinks");
        }
        System.out.println("A");
        System.out.println("B");
    }
}
import java.util.Scanner;
public class Ahmedjava {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int num = 0;
        System.out.println("Enter integer number");
        num = in.nextInt();
        if (num > 0) {
            System.out.println("Positive!");
        } else {
            System.out.print("Negative!");
        }
    }
}
import java.util.Scanner;
public class Ahmedjava {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int num = 0;
        System.out.println("Enter integer number");
        num = in.nextInt();
        if(num%2==0){
            System.out.println("Even");
        }
        else{
            System.out.println("Odd");
        }
    }
}
import java.util.Scanner;
public class Ahmedjava {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int num = 0;
        System.out.println("Enter integer number");
        num = in.nextInt();
        if (num % 2 == 0) {
            if (num > 10) {
                System.out.println("Even");
            }
        } else {
            System.out.println("Odd");
        }
    }
}
import java.util.Scanner;
public class Ahmedjava {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int num = 0;
        System.out.println("Enter integer number");
        num = in.nextInt();
        if (num % 2 == 0) {
            if (num > 10) {
                System.out.println("Even");
                System.out.println("and greater than 10");
            } else {
                System.out.println("Even");
                System.out.println("and less than 10");
            }
        } else {
            System.out.println("Odd");
        }
    }
}
import java.util.Scanner;
public class Ahmedjava {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int num = 0;
        System.out.println("Enter integer number");
        num = in.nextInt();
        if(num>10){
        System.out.println("greater than 10");}
        else if(num==10){
        System.out.println("equal 10");}
        else {
        System.out.println("less than 10");}
    }
}


import java.util.Scanner;
public class Ahmedjava {
    public static void main(String[] args) {
        int mark;
        Scanner input=new Scanner(System.in);
        System.out.println("Enter your grade:");
        mark=input.nextInt();
        if(mark>=90){
            System.out.println("A");
        }
        else if(mark>=80){
            System.out.println("B");
        }
        else if (mark>=70) {
            System.out.println("C");
        }
        else if(mark>=60){
            System.out.println("D");
        }
        else{
            System.out.println("fail");
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int mark;
        System.out.println("Please Enter mark:");
        mark = input.nextInt();
        if (mark >= 90 && mark <= 100) {
            System.out.println("A");
        } else if (mark >= 80 && mark < 90) {
            System.out.println("B");
        } else if (mark >= 70 && mark < 80) {
            System.out.println("C");
        } else if (mark >= 60 && mark < 70) {
            System.out.println("D");
        } else {
            System.out.println("fail");
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        boolean x = (5 > 4) || (10 < 5 * 5);
        System.out.println(x);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int y = 1, z;
        if (y == 1) {
            z = 2;
        } else {
            z = 5;
        }
        System.out.println(z);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int y = 1;
        int Z = y == 1 ? 2 : 5;
        System.out.println(Z);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int y = 1;
        int Z = y == 2 ? 2 : 5;
        System.out.println(Z);
    }
}
import java.util.Scanner;
public class Mohamed {

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int mark;
        mark = input.nextInt();
        String r = (mark >= 90 && mark <= 100) ? "A"
                : (mark >= 80 && mark < 90) ? "B"
                : (mark >= 70 && mark < 80) ? "C" 
                : (mark >= 60 && mark < 70) ? "D":"fail";
        System.out.println(r);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int mark;
        mark = input.nextInt();
        String r = (mark >= 90 && mark <= 100) ? "A"
                : (mark >= 80 && mark < 90) ? "B"
                : (mark >= 70 && mark < 80) ? "C" 
                : (mark >= 60 && mark < 70) ? "D" : "fail";
        System.out.println(r);
        System.out.println(r instanceof String);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int mark;
        mark = input.nextInt();
        String r = (mark >= 90 && mark <= 100) ? "A"
                 : (mark >= 80 && mark < 90) ? "B"
                 : (mark >= 70 && mark < 80) ? "C" 
                 : (mark >= 60 && mark < 70) ? "D" : "fail";
        System.out.println(r);
        System.out.println(r instanceof String);// test data type
        System.out.println(input instanceof Scanner);//test data type
    }
}

import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int x = 2;
        switch (x) {
        case 1:
            System.out.println("case #1");
            break;
        case 2:
            System.out.println("case #2");
            break;
        case 3:
            System.out.println("case #3");
            break;
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int x = 5;
        switch (x) {
        case 1:
            System.out.println("case #1");
            break;
        case 2:
            System.out.println("case #2");
            break;
        case 3:
            System.out.println("case #3");
            break;
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int x = 5;
        switch (x) {
        case 1:
            System.out.println("case #1");
            // break;
        case 2:
            System.out.println("case #2");
            // break;
        case 3:
            System.out.println("case #3");
            // break;
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int x = 2;
        switch (x) {
        case 1:
            System.out.println("case #1");
            // break;
        case 2:
            System.out.println("case #2");
            // break;
        case 3:
            System.out.println("case #3");
            // break;
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int x = 1;
        switch (x) {
        case 1:
            System.out.println("case #1");
            // break;
        case 2:
            System.out.println("case #2");
            // break;
        case 3:
            System.out.println("case #3");
            // break;
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int x = 1;
        switch (x) {
        case 1:
            System.out.println("case #1");
            // break;
        case 2:
            System.out.println("case #2");
            // break;
        case 3:
            System.out.println("case #3");
            // break;
        default:
            System.out.println("It is not an option");
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int x = 5;
        switch (x) {
        case 1:
            System.out.println("case #1");
            break;
        case 2:
            System.out.println("case #2");
            break;
        case 3:
            System.out.println("case #3");
            break;
        default:
            System.out.println("It is not an option");
        }
    }
}
import java.util.Scanner;
import javax.swing.SwingConstants;
public class Mohamed {

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("Play enter day#");
        int day=input.nextInt();
        switch(day){
            case 1:
            case 2:
            case 3:
            case 4:
            case 5:
            System.out.println("Weekday");
            break;
            case 6:
            case 7:
            System.out.println("Weekday");
            break;
            default:
            System.out.println("It is not an option");
        }
    }
}
import java.util.Scanner;
import javax.swing.SwingConstants;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("Play enter day#");
        int day = input.nextInt();
        switch (day) {// byte,short,char,and int primitive data types.
        case 1:
        case 2:
        case 3:
        case 4:
        case 5:
            System.out.println("Weekday");
            break;
        case 6:
        case 7:
            System.out.println("Weekday");
            break;
        default:
            System.out.println("It is not an option");
        }
    }
}
import java.util.Scanner;
import javax.swing.SwingConstants;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("Enter one of these operators:(*, /, %, +, -)");
        char c = input.next().charAt(0);
        int n1, n2;
        System.out.println("Enter n1:");
        n1 = input.nextInt();
        System.out.println("Enter n2:");
        n2 = input.nextInt();
        switch (c) {
        case '*':
            System.out.println("res=" + (n1 * n2));
            break;
        case '/':
            System.out.println("res=" + (n1 / n2));
            break;
        case '%':
            System.out.println("res=" + (n1 % n2));
            break;
        case '+':
            System.out.println("res=" + (n1 + n2));
            break;
        case '-':
            System.out.println("res=" + (n1 - n2));
            break;
        default:
            System.out.println("It is not an option");
        }
    }
}
import java.util.Scanner;
import javax.swing.SwingConstants;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("Enter a letter:");
        char c = input.next().charAt(0);
        switch (c) {
        case 'a':
            System.out.println(c);
            break;
        case 'b':
            System.out.println(c);
            break;
        case 'c':
            System.out.println(c);
            break;
        default:
            System.out.println("It is not an option");
        }
    }
}
import java.util.Scanner;
import javax.swing.SwingConstants;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("Enter a letter:");
        char c = input.next().charAt(0);
        switch (c) {
        case 'a':
            System.out.println(c);
            System.out.println("Enter number:");
            int x = input.nextInt();
            if (x < 10) {
                System.out.println("hello ahmed");
            }
            break;
        case 'b':
            System.out.println(c);
            break;
        case 'c':
            System.out.println(c);
            break;
        default:
            System.out.println("It is not an option");
        }
    }
}
import java.util.Scanner;
import javax.swing.SwingConstants;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        switch(3){//switch no can use (n>50&&n<100)
            case 1:{
                break;
            }
            case 2+1:
            System.out.println("case 2+1");
            break;
            default:
            System.out.println("It is not an option"));
        }          
    }
}
import java.util.Scanner;
import javax.swing.SwingConstants;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        switch(50){//switch no can use (n>50&&n<100)
            case 1:{
                break;
            }
            case 100:
            case 50:
            System.out.println("case 2+1");
            break;
            default:
            System.out.println("It is not an option");
        }       
    }
}

import java.util.Scanner;
import javax.swing.SwingConstants;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        while (true) {//just take (true) or (false)
            System.out.println("hello ahmed");
        }
    }
}
import java.util.Scanner;
import javax.swing.SwingConstants;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int count = 1;
        while (count <= 5) {
            System.out.println("HI");
            count++;
        }
    }
}
import java.util.Scanner;
import javax.swing.SwingConstants;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int count = 1;
        while (count <= 5) {
            System.out.println("HI");
            ++count;
        }
        System.out.println("count = " + count);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int count = 5;
        while (count >= 1) {
            System.out.println("HI");
            count--;
        }
        System.out.println("count = " + count);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int count = 5;
        while (count >= 1) {
            System.out.println("HI");
            count = count - 2;//count-=2
        }
        System.out.println("count = " + count);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int count = 1;
        while (count <= 5) {
            System.out.println("Hi");
            // ++count;
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int count = 1;
        while (count++ <= 5) {
            System.out.println("Hi #" + count);
            // ++count;
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int count = 1;
        while (count++ <= 5) {
            System.out.println("Hi #" + count);
            // ++count;
        }
        System.out.println("count=" + count);
    }
}



import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        // g f d 6 i k i o q
        char letter = 'a';
        while (letter != 'q') {
            letter = input.next().charAt(0);
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        // g f d 6 i k i o q
        int c = 0;
        char letter = 'a';
        while (letter != 'q') {
            letter = input.next().charAt(0);
            ++c;
        }
        System.out.println("Count=" + c);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        char letter = 'a';
        int c = 0;
        boolean flag = true;
        while (flag) {
            letter = input.next().charAt(0);
            c++;
            if (letter == 'q') {
                flag = false;
            }
        }
        System.out.println("Count:" + c);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        float sum = 0;
        float grade = 0;
        int count = 0;
        while (grade != -1) {
            System.out.println("Enter grade #" + (count + 1) + ": ");
            grade = input.nextFloat();
            if (grade != -1) {
                sum += grade;
                count++;
            }
        }
        System.out.println("Avg==" + sum / count);
    }
}

import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int c = 0;
        do {
            System.out.println("java");
            c++;
        } while (c < 5);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int c = 0;
        do {
            System.out.println("java");
            c++;
        } while (false);
    }
}


import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        // Repetition control statament.
        // for loop.
        int c = 0;
        while (c < 5) {
            System.out.println(c);
            c++;
        }
    }
}

import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        // Repetition control statament.
        // for loop.
        int c = 0;
        while (c < 5) {
            System.out.println(c);
            c++;
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int c = 0;
        for (; c < 5;) {
            System.out.println(c);
            c++;
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        for (int c = 0; c < 5; c++) {
            System.out.println(c);
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        for (int c = 0; c < 5; c++) {
            System.out.println(c);
        }
        System.out.println("c==" + c);//error
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int c = 0;
        for (; c < 5; c++) {
            System.out.println(c);
        }
        System.out.println("c==" + c);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        for (int c = 2; c < 10; c = c + 2) {//c+=2
            System.out.println(c);
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int c = 2;
        for (; c < 10; c = c + 2) {
            System.out.println(c);
        }
        System.out.println(c);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        for (int i = 1; i < 10 && i % 2 == 0; ++i) {
            System.out.println(i);
            // i++;
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        for (int i = 0, j = 0; i < 10 && j < 10; ++i, ++j) {
            if (i % 2 == 0 && j % 2 == 0) {
                System.out.println(i + " " + j);
            }
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        for (int i = 0, j = 0; i < 10 || j < 5; i++, j++) {
            System.out.println("i = " + i + "\t" + "j= " + j);
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        for (int i = 0, j = 0; i < 10 && j < 5; i++, j++) {
            System.out.println("i = " + i + "\t" + "j= " + j);
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        for (int i = 0, j = 0; i < 10 && j < 5; i++, j++) {
            System.out.println("i = " + i + "\t" + "j= " + j);
        }
    }
}



import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        // Write a program to print numbers from 1 to 10.
        for (int i = 1; i < 10; i++) {
            System.out.println(i);
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        // Write a program to print numbers from 1 to 10.
        int i = 1;
        do {
            System.out.println(i);
            i++;
        } while (i <= 10);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        /*
         * Write a program to calculate the sum
         * of 10 floating point numbers using for loop.
         */
        float sum = 0;
        for (int i = 1; i <= 10; i++) {
            sum = sum + i;// sum+=i
        }
        System.out.println("sum==" + sum);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        /*
         * Write a program to calculate the sum of 10 floating point numbers using for loop.
         */
        float sum = 0;
        for (int i = 1; i <= 10; i++) {
            sum = sum + i;// sum+=i
        }
        System.out.println("sum==" + sum);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        /*
         * write a program to calculate the sum of 10 floating point number.
         */
        Scanner input = new Scanner(System.in);
        float sum = 0, num;
        for (float i = 1; i <= 10; i++) {
            System.out.println("Enter any number:");
            num = input.nextFloat();
            sum = sum + num;
        }
        System.out.println("sum==" + sum);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        /*
         * write a program that that asking the user to input a positive integer.It
         * should than print the multiplication table of that number.
         */
        Scanner input = new Scanner(System.in);
        int num = input.nextInt();
        for (int i = 1; i <= 10; i++) {
            System.out.println(num + "*" + i + "=" + (num * i));
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        /* write a program to find the factorial value of any number */
        // !4=4*3*2*1=24
        // !5=5*4*3*2*1=120
        Scanner input = new Scanner(System.in);
        System.out.println("Enter any number:");
        int num = input.nextInt();
        int f = 1;
        for (int i = num; i >= 1; i--) {
            f = f * i;
        }
        System.out.println("factorial==" + f);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        /*
         * Write a program that enters 10 integer number from the user,and then prints
         * the sum of the even and odd integers
         */
        Scanner input = new Scanner(System.in);
        int num, sumEven = 0, sumOdd = 0, i = 0;
        while (i < 10) {
            System.out.println("Enter integer number:");
            num = input.nextInt();
            if (num % 2 == 0) {
                sumEven = sumEven + num;
            } else {
                sumOdd = sumOdd + num;
            }
            i++;
        }
        System.out.println("The sum of Even numbers==" + sumEven);
        System.out.println("The sum of Odd numbers==" + sumOdd);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        /*
         * Write a program that enters 10 integer number from the user,and then prints
         * the sum of the even and odd integers
         */
        Scanner input = new Scanner(System.in);
        int num, sumEven = 0, sumOdd = 0, i = 0;
        int countEven = 0, countOdd = 0;
        while (i < 10) {
            System.out.println("Enter integer number:");
            num = input.nextInt();
            if (num % 2 == 0) {
                countEven++;
            } else {
                countOdd++;
            }
            i++;
        }
        System.out.println("The sum of Even numbers==" + countEven);
        System.out.println("The sum of Odd numbers==" + countOdd);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        // 1+ 1/2 + 1/3 + 1/4 + 1\5 +.......1/n
        Scanner input = new Scanner(System.in);
        int num = input.nextInt();
        float sum = 0;
        for (int i = 1; i <= num; i++) {
            sum += 1.0 / i;
        }
        System.out.println("sum is=" + sum);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        float n, sum = 0.0f;
        for (int i = 1; i <= 10; i++) {
            System.out.println("Enter # " + i + " : ");
            n = input.nextFloat();
            sum += n;
        }
        float avg = sum / 10;
        System.out.println("Avg==" + avg);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        for (int i = 0; i < 10; i++) {
            if (i == 4) {
                break;
            }
            System.out.println("i=" + i);
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        for (int i = 0; i < 10; i++) {
            if (i == 4) {
                break;
            }
            System.out.println("i=" + i);
        }
        System.out.println("Ahmed abdelmoneim");
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        for (int i = 0; i < 10; i++) {
            if (i == 4) {
                continue;
            }
            System.out.println("i=" + i);
        }
        System.out.println("Ahmed abdelmoneim");
    }
}
import java.util.Scanner;

public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("Test yourself:");
        System.out.println("what is '5+10/2*10=?':");
        float UserAnswer, TheCorrectAnswer = 55;
        boolean questionAnswer = false;
        for (int i = 1; i < 3; i++) {
            UserAnswer = input.nextFloat();
            if (UserAnswer == TheCorrectAnswer) {
                questionAnswer = true;
                break;
            } else if (UserAnswer != TheCorrectAnswer) {
                System.out.println("Chance #" + (i + 1) + " : ");
                continue;
            }
        }
        if (questionAnswer) {
            System.out.println("Correct Answer");
        } else {
            System.out.println("Wrong Answer");
        }
    }
}
import java.util.Scanner;

public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        for (int i = 1; i <= 5; i++) {
            System.out.println("Outer loop#" + i);
            for (int j = 1; j <= 3; j++) {
                System.out.println("Nested loop#" + j);
            }
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        for (int i = 1; i <= 2; i++) {
            System.out.println("Outer loop#i=" + i);
            for (int j = 1; j <= 3; j++) {
                System.out.println("Nested loop#j=" + j);
                for (int k = 1; k <= 2; k++) {
                    System.out.println("Nested loop#k=" + k);
                }
            }
        }
    }
}
import java.util.Scanner;

public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        test: {
            if (5 < 6) {
                break test;
            }
            System.out.println("1");
            System.out.println("2");
            System.out.println("3");
            System.out.println("4");
        }
        System.out.println("5");
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        for (int row = 1; row <= 10; row++) {
            for (int column = 1; column <= 5; column++) {
                System.out.print("* ");
            }
            System.out.println("");
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        stop: {
            for (int row = 1; row <= 10; row++) {
                for (int column = 1; column <= 5; column++) {
                    if (row == 5) {
                        break stop;
                    }
                    System.out.print("* ");
                }
                System.out.println("");
            }
        }
    }
}
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        for (int row = 1; row <= 5; row++) {
            System.out.println();
            for (int column = 1; column <= 10; column++) {
                if (column > row) {
                    continue;
                }
                System.out.print("* ");
            }
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        nextRow: for (int row = 1; row <= 5; row++) {
            System.out.println();
            for (int column = 1; column <= 10; column++) {
                if (column > row) {
                    continue nextRow;
                }
                System.out.print("* ");
            }

            System.out.println("Ahmed Abdelmoneim");
        }
    }
}
public class MyName {
    public static void main(String[] args) {// Method/function.
        System.out.println("Ahmed");
        System.out.println("Ali");
        System.out.println("Mohammed");
        System.out.println("Belal");
    }
}
public class MyName {
    public static void main(String[] args) {// Method/function.
        System.out.println("Ahmed");
        System.out.println("Ali");
        System.out.println("Mohammed");
        System.out.println("Belal");
        System.out.println("Ahmed");
        System.out.println("Ali");
        System.out.println("Mohammed");
        System.out.println("Belal");
    }
}
public class MyName {
    // Return value type:voidنوع القيمة الراجعة
    public static void fun() {
        System.out.println("Ahmed");
        System.out.println("Ali");
        System.out.println("Mohammed");
        System.out.println("Belal");
    }
    public static void main(String[] args) {// Method/function.
        // invoke,callاستدعاء,دعوه
        fun();
    }
}
public class MyName {
    public static void fun() {
        System.out.println("Ahmed");
        System.out.println("Ali");
        System.out.println("Mohammed");
        System.out.println("Belal");
    }
    public static void main(String[] args) {
        fun();
        fun();
    }
}
public class MyName {
    public static void main(String[] args) {
        fun();
        fun();
    }
    public static void fun() {
        System.out.println("Ahmed");
        System.out.println("Ali");
        System.out.println("Mohammed");
        System.out.println("Belal");
    }
}
import java.util.Scanner;
public class MyName {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int n1, n2;
        System.out.println("Enter number1:");
        n1 = input.nextInt();
        System.out.println("Enter number2:");
        n2 = input.nextInt();
        int sum = n1 + n2;
        System.out.println("the sum==" + sum);
    }
}
import java.util.Scanner;
public class MyName {
    static int SumTwoNumbers(int n1, int n2) {
        int sum = n1 + n2;
        return sum;
    }
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int n1, n2;
        System.out.println("Enter number1:");
        n1 = input.nextInt();
        System.out.println("Enter number2:");
        n2 = input.nextInt();
        System.out.println("the sum==" + SumTwoNumbers(n1, n2));
    }
}
import java.util.Scanner;
public class MyName {
    static int SumTwoNumbers(int n1, int n2) {
        int sum = n1 + n2;
        return sum;
    }
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("the sum==" + SumTwoNumbers(50, 60));
    }
}
import java.util.Scanner;
public class MyName {
    static int SumTwoNumbers(int n1, int n2) {
        return n1 + n2;
    }
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("the sum==" + SumTwoNumbers(50, 60));
        System.out.println("the sum==" + SumTwoNumbers(200, 50));
    }
}
import java.util.Scanner;
public class MyName {
    static int SumTwoNumbers(int n1, int n2) {
        return n1 + n2;
    }
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("the sum==" + SumTwoNumbers(50, 60));
        System.out.println("the sum==" + SumTwoNumbers(200, 50));
    }
}
import java.util.Scanner;
public class MyName {
    static int SumTwoNumbers(int n1, int n2) {
        System.out.println("sum:");
        return n1 + n2;
    }
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int s = SumTwoNumbers(5, 5);
        s = s + 2;
        System.out.println("sum==" + s);
    }
}
import java.util.Scanner;
public class MyName {
    static int SumTwoNumbers(int n1, int n2) {
        System.out.println("sum:");
        return n1 + n2;
    }
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int s = SumTwoNumbers(5, 5);
        s = s + 2;
        System.out.println("sum==" + s);
    }
}
import java.util.Scanner;
public class MyName {
    static voidSumTwoNumbers(int n1, int n2) {
        System.out.println("sum=="+(n1+n2));
    }
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int s = SumTwoNumbers(5, 5);//error
        s = s + 2;
        System.out.println("sum==" + s);
    }
}
import java.util.Scanner;
public class MyName {
    static void SumTwoNumbers(int n1, int n2) {
        System.out.println("sum==" + (n1 + n2));
    }
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        SumTwoNumbers(5, 5);
    }
}
import java.util.Scanner;
public class MyName {
    static void SumTwoNumbers(int n1, int n2) {
        if (n1 == 0 && n2 == 0) {
            return;
        }
        System.out.println("sum==" + (n1 + n2));
    }
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        SumTwoNumbers(5, 5);
    }
}





import java.util.Scanner;
/*write a Java method to find 
the smallest number among three numbers*/
public class MyName {
    static int min(int n1, int n2, int n3) {
        int minNumber = n1;
        if (minNumber > n2) {
            minNumber = n2;
        }
        if (minNumber > n3) {
            minNumber = n3;
        }
        return minNumber;
    }
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int n1 = input.nextInt();
        int n2 = input.nextInt();
        int n3 = input.nextInt();
        System.out.println("minimum number=" + min(n1, n2, n3));
    }
}
import java.util.Scanner;
/*write a Java method to find 
the smallest number among three numbers*/
public class MyName {
    static int min(int n1, int n2, int n3) {
        int minNumber = n1;
        if (minNumber > n2) {
            minNumber = n2;
        }
        if (minNumber > n3) {
            minNumber = n3;
        }
        return minNumber;
    }
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("Enter #1:");
        int n1 = input.nextInt();
        System.out.println("Enter #2:");
        int n2 = input.nextInt();
        System.out.println("Enter #3:");
        int n3 = input.nextInt();
        System.out.println("minimum number=" + min(n1, n2, n3));
    }
}
import java.util.Scanner;
/*
Write a Java method to compute the average of three numbers
 */
public class MyName {
    static float avg(float n1, float n2, float n3) {
        float average, sum = n1 + n2 + n3;
        average = sum / 3;
        return average;
    }
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("avg" + avg(100, 99, 98));
    }
}
import java.util.Scanner;
/*
Write a Java method to compute the average of three numbers
 */
public class MyName {
    static float avg(float n1, float n2, float n3) {
        return (n1 + n2 + n3) / 3;
    }
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("avg" + avg(100, 99, 98));
    }
}
import java.util.Scanner;
/*
Write a Java method to compute the average of three numbers
 */
public class MyName {
    static float avg(float n1, float n2, float n3) {
        return (n1 + n2 + n3) / 3;
    }
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        float ahmed = avg(10, 11, 12);
        ahmed++;
        System.out.println(ahmed);
    }
}
import java.util.Scanner;
public class MyName {
    public static int sum(int... n) {// int[]n
        int s = 0;
        for (int i : n) {
            s += i;
        }
        return s;
    }
    public static void main(String[] args) {
        System.out.println("sum =" + sum(5, 6, 7, 8));
    }
import java.util.Scanner;
public class MyName {
    public static int sum(int... n) {// int[]n
        int s = 0;
        for (int i : n) {//i=n every loop.
            s += i;
        }
        return s;
    }
    public static void main(String[] args) {
        System.out.println("sum =" + sum(5, 6, 7, 8));
    }
}
import java.util.Scanner;
public class MyName {
    public static int sum(int... n) {// int[]n
        int s = 0;
        for (int i : n) {//i=n every loop.
            s += i;//s=s+i;
        }
        return s;
    }
    public static void main(String[] args) {
        System.out.println("sum =" + sum(5, 6, 7, 8));
    }
}


import java.util.Scanner;
public class MyName {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("abs==" + Math.abs(-1.1));
    }
}
import java.util.Scanner;
public class MyName {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("ceil==" + Math.ceil(-1.1));
    }
}
import java.util.Scanner;
public class MyName {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("ceil==" + Math.ceil(1.2));
    }
}
import java.util.Scanner;
public class MyName {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("ceil==" + Math.ceil(1.5));
    }
}
import java.util.Scanner;
public class MyName {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("ceil==" + Math.ceil(-1.9));
    }
}
public class MyName {
    public static void main(String[] args) {

        System.out.println("floor==" + Math.floor(1.9));
    }
}
public class MyName {
    public static void main(String[] args) {
        System.out.println("floor==" + Math.floor(-1.9));
    }
}
public class MyName {
    public static void main(String[] args) {
        System.out.println("round==" + Math.round(1.1));
    }
}
public class MyName {
    public static void main(String[] args) {
        System.out.println("round==" + Math.round(1.6));
    }
}
public class MyName {
    public static void main(String[] args) {

        System.out.println("sqrt==" + Math.sqrt(9));
    }
}
public class MyName {
    public static void main(String[] args) {
        System.out.println("sqrt==" + Math.sqrt(100));
    }
}
public class MyName {
    public static void main(String[] args) {
        System.out.println("Power==" + Math.pow(3, 10));
        System.out.println("Power==" + Math.pow(3, 4));
    }
}
public class MyName {
    public static void main(String[] args) {
        System.out.println("random==" + Math.random());//0.0<=value<1.0.
        System.out.println("random==" + Math.random());
    }
}
public class MyName {
    public static void main(String[] args) {
        double r = (Math.random() * ((10 - 1) + 1) + 1);
        // double r = (Math.random() * 11);
        System.out.println("random=" + r);
    }
}
import java.util.Random;
public class MyName {
    public static void main(String[] args) {
        int r = (int) (Math.random() * ((10 - 1) + 1) + 1);// use type casting
        // double r = (Math.random() * 11);
        System.out.println("random=" + r);
    }
}
import java.util.Random;
public class MyName {
    public static void main(String[] args) {
        int r = (int) (Math.random() * ((10 - 1) + 1) + 1);// use type casting
        // double r = (Math.random() * 11);
        System.out.println("random=" + r);
    }
}
public class MyName {
    public static void main(String[] args) {
        System.out.println("Max==" + Math.max(20, 30));
    }
}
public class MyName {
    public static void main(String[] args) {
        System.out.println("Max==" + Math.max(20.5, 30));
    }
}
public class MyName {
    public static void main(String[] args) {
        System.out.println("Max==" + Math.max(20.5, Math.max(30, 40)));
    }
}
import javax.swing.plaf.basic.BasicInternalFrameTitlePane.MaximizeAction;
public class MyName {
    public static void main(String[] args) {
        System.out.println("Pow=" + Math.pow((Math.sqrt(100)), 2));
    }
}










public class MyName {
    static int sum(int n1, int n2) {
        return n1 + n2;
    }
    public static void main(String[] args) {
        System.out.println("Sum==" + sum(10, 50));
    }
}
public class MyName {
    static int sum(int n1, int n2) {
        return n1 + n2;
    }
    static float sum(float n1, float n2) {
        return n1 + n2;
    }
    public static void main(String[] args) {
        System.out.println("Sum==" + sum(10, 50));
        System.out.println("Sum==" + sum(10.5f, 50.7f));
    }
}
public class MyName {
    static int sum(int n1, int n2) {
        return n1 + n2;
    }
    static float sum(float n1, float n2) {
        return n1 + n2;
    }
    static float sum(int n1, float n2) {
        return n1 + n2;
    }
    public static void main(String[] args) {
        System.out.println("Sum==" + sum(10, 50));
        System.out.println("Sum==" + sum(10.5f, 50.7f));
        System.out.println("Sum==" + sum(10, 10.5f));
    }
}
public class MyName {
    static float order(float total) {
        return total;
    }
    static float order(float total, int deliverycosts) {
        return total + deliverycosts;
    }
    static float order(float total, int deliverycosts, String promo) {
        return total + deliverycosts - 2;
    }
    public static void main(String[] args) {
        System.out.println(order(15, 3, "Ahmed"));
    }
}
public class MyName {
    static void fun() {
        System.out.println("fun:");
    }
    static void fun(int x) {
        fun();
        System.out.println("x==" + x);
    }
    public static void main(String[] args) {
        fun(15);
    }
}
public class MyName {
    public static void main(int num) {
        System.out.println(num);
    }

    public static void main(String[] args) {
        main(500);
    }
}



public class MyName {
    static void fun() {
        System.out.println("Hi");
        fun();
    }
    public static void main(String[] args) {
        fun();
    }
}
public class MyName {
    static int count = 0;
    static void fun() {
        count++;
        if (count < 5) {
            System.out.println("Hi");
            fun();
        }
    }
    public static void main(String[] args) {
        fun();
    }
}
public class MyName {
    static int count = 0;
    static void fun() {
        count++;
        if (count < 5) {
            System.out.println("Hi");
            fun();
        }
    }
    public static void main(String[] args) {
        fun();
    }
}
public class MyName {
    static int count = 0;
    static void fun() {
        count++;
        if (count < 5) {
            System.out.println("Hi");
            fun();
        }
        count++;//error.
    }
    public static void main(String[] args) {
        fun();
    }
}
public class MyName {
    static int count = 0;
    static void fun() {
        if (count == 5) {// base case
            return;
        }
        count++;
        System.out.println("Hi Ahmed");
        fun();
    }
    public static void main(String[] args) {
        fun();
    }
}
public class MyName {
    static int count = 0;
    static void fun() {
        if (count == 5) {// base case
            return;
        }
        count++;
        System.out.println("Hi Ahmed");
        fun();
    }
    public static void main(String[] args) {
        fun();
    }
}
public class MyName {
    static int fact(int n) {// 5!=5*4*3*2*1
        if (n == 1) {
            return n;
        } else {
            return n * fact(n - 1);
        }
    }
    public static void main(String[] args) {
        System.out.println("fact==" + fact(5));
    }
}
public class MyName {
    static int fact(int n) {// 5!=5*4*3*2*1
        if (n == 1||n==0) {
            return n;
        } else {
            return n * fact(n - 1);
        }
        /*5*fact(4)
        4*fact(3)
        3*fact(2)
        2*fact(1)
        1 
        */
    }
    public static void main(String[] args) {
        System.out.println("fact==" + fact(5));
    }
}
public class MyName {
    static void fun(int n) {
        if (n < 1) {
            return;
        } else {
            System.out.println("# " + n);
            fun(n - 1);
        }
    }
    public static void main(String[] args) {
        fun(5);
    }
}
public class MyName {
    static void fun(int n) {
        if (n < 1) {
            return;
        } else {
            fun(n - 1);
            System.out.println("# " + n);
        }
    }
    public static void main(String[] args) {
        fun(5);
    }
}
public class MyName {
    static int fact(int n) {
        if (n == 1) {//no n==75
            return 1;
        } else {
            return n * fact(n - 1);
        }
    }
    public static void main(String[] args) {
        System.out.println("fact =" + fact(10));//no fact =75
    }
}
public class MyName {
    static void directRecfun(){
        directRecfun();
    }
    static void indirectRecfun1(){
        indirectRecfun2();
    }
    static void indirectRecfun2(){
        indirectRecfun1();
    }
    public static void main(String[] args) {
        
    }
}


public class MyName {
    // Fibonacci
    // 0 1 2 3 4 5 6 7 8 9 10...etc.
    // 0 1 1 2 3 5 8 13 21 34 55...etc.
    static int fib(int num) {
        if (num == 0 || num == 1) {
            return num;
        } else {
            return fib(num - 1) + fib(num - 2);
        }
    }
    public static void main(String[] args) {
        System.out.println("fib = " + fib(7));
    }
}
public class MyName {
    static int n1 = 0, n2 = 1, n3;
    static void printfib(int n) {
        if (n > 0) {
            n3 = n1 + n2;
            n1 = n2;
            n2 = n3;
            System.out.println(" " + n3);
            printfib(n - 1);
        }
    }
    public static void main(String[] args) {
        System.out.println(n1 + " " + n2);
        int num = 5;
        printfib(num);
    }
}
public class MyName {
    static int n1 = 0, n2 = 1, n3;
    static void printfib(int n) {
        if (n > 0) {
            n3 = n1 + n2;
            n1 = n2;
            n2 = n3;
            System.out.println(" " + n3);
            printfib(n - 1);
        }
    }
    public static void main(String[] args) {
        System.out.println(n1 + " " + n2);
        int num = 5;
        printfib(num);
    }
}
public class MyName {
    static int sum(int n1, int n2) {
        if (n1 == n2) {
            return n1;
        } else {
            return n1 + sum(n1 + 1, n2);
        }
    }
    public static void main(String[] args) {
        System.out.println("sum = " + sum(4, 6));
    }
}
public class MyName {
    static int sum(int n1, int n2) {
        if (n1 == n2) {
            return n1;
        } else {
            if (n1 < n2) {
                return n1 + sum(n1 + 1, n2);
            } else {
                return n1 + sum(n1 - 1, n2);
            }
        }
    }
    public static void main(String[] args) {
        System.out.println("sum = " + sum(6, 4));
    }
}


public class MyName {

    public static void main(String[] args) {
        int[] num = new int[5];
        num[0] = 15;
        num[1] = 33;
        System.out.println(num[1]);
    }
}
public class MyName {
    public static void main(String[] args) {
        int[] num = new int[5];
        num[0] = 15;
        num[1] = 33;
        num[2] = 52;
        num[3] = 85;
        num[4] = 55;
        System.out.println(num[4]);
    }
}
public class MyName {
    public static void main(String[] args) {
        int num[] = { 1, 8, 9, 5 };
        System.out.println(num[0] + " " + num[1]);
    }
}
public class MyName {
    public static void main(String[] args) {
        int num[] = { 1, 8, 9, 5 };
        System.out.println(num[0] + " " + num[1]);

    }
}
public class MyName {
    public static void main(String[] args) {
        int num[] = { 1, 8, 9, 5 };
        System.out.println(num[0] + " " + num[1]);
        num[0] = 55;
        System.out.println(num[0]);
    }
}
public class MyName {
    public static void main(String[] args) {
        int num[] = { 1, 8, 9, 5 };
        System.out.println(num[0] + " " + num[1]);
        num[0] = 55;
        System.out.println(num.length);
    }
}
public class MyName {
    public static void main(String[] args) {
        double[] arr = new double[6];
        System.out.println(arr[0]);
    }
}
public class MyName {
    public static void main(String[] args) {
        int[] arr = new int[6];
        System.out.println(arr[0]);
    }
}
public class MyName {
    public static void main(String[] args) {
        //char[] arr = new char[6];
        // char arr[0] = 'a';
        //char arr[5]={'a','b','c','d'}
        System.out.println(arr[0]);
    }
}
public class MyName {
    public static void main(String[] args) {
        String[] arr = { "Ali", "Ahmed", "Belal" };
        System.out.println(arr[0]);
    }
}
public class MyName {
    public static void main(String[] args) {
        String[] arr =new String[] { "Ali", "Ahmed", "Belal" };
        System.out.println(arr[0]);
    }
}
public class MyName {
    public static void main(String[] args) {
        String[] arr = new String[] { "Ali", "Ahmed", "Belal" };
        System.out.println(arr[0]);
        System.out.println(arr[1]);
        System.out.println(arr[2]);
    }
}
public class MyName {
    public static void main(String[] args) {
        String[] arr = { "Ali", "Ahmed", "Belal" };
        /*
         * System.out.println(arr[0]); 
         System.out.println(arr[1]);
         * System.out.println(arr[2]);
         */
        for (String i : arr) {
            System.out.println(i);
        }
    }
}
public class MyName {
    public static void main(String[] args) {
        String[] arr = { "Ali", "Ahmed", "Belal" };
        for (int i = 0; i < arr.length; i++) {
            System.out.println(i);
        }
    }
}
public class MyName {
    public static void main(String[] args) {
        String[] arr = { "Ali", "Ahmed", "Belal" };
        /*
         * for (int i = 0; i < arr.length; i++) { System.out.println(i); }
         */
        for (String i : arr) {
            System.out.println(i);
        }
    }
}
public class MyName {
    public static void main(String[] args) {
        String[] arr = { "Ali", "Ahmed", "Belal" };
        /*
         * for (int i = 0; i < arr.length; i++) { System.out.println(i); }
         */
        for (String i : arr) {
            System.out.println(i);
        }
    }
}
import java.util.Scanner;
public class MyName {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int size = input.nextInt();// short data type
        int[] arr = new int[size];
        arr[0] = 15;
        System.out.println(arr[0]);
    }
}








//Arrays (One-Dimensional):
/*
An array is a Container object that holds a fixed 
number of values of a single data type.
*/
public class MedoClass {
    public static void main(String[] args) {
        int []num=new int[5];
        num[0]=15;
        System.out.print(num[0]);
    }
}
public class Amazon {
    public static void main(String[] args) {
        int[] num = new int[5];
        num[0] = 10;
        num[1] = 30;
        System.out.println(num[1]);
    }
}
public class Amazon {
    public static void main(String[] args) {
        int[] num = new int[5];
        num[0] = 10;
        num[1] = 20;
        num[2] = 30;
        num[3] = 40;
        num[4] = 50;
        System.out.println(num[4]);
    }
}
public class Amazon {
    public static void main(String[] args) {
        int[] num = new int[5];//take from zero to four.
        num[0] = 10;
        num[1] = 20;
        num[2] = 30;
        num[3] = 40;
        num[4] = 50;
        num[5] = 60;//Error 
        System.out.println(num[5]);//Error
    }
}
public class Amazon {
    public static void main(String[] args) {
        int num[] = new int[5];
        num[0] = 10;
        num[1] = 20;
        num[2] = 30;
        num[3] = 40;
        num[4] = 50;
        num[5] = 60;
        System.out.println(num[5]);
    }
}
public class Amazon {
    public static void main(String[] args) {
        int num[]; 
        num=new int[5];
        num[0] = 10;
        num[1] = 20;
        num[2] = 30;
        num[3] = 40;
        num[4] = 50;
        num[5] = 60;
        System.out.println(num[5]);
    }
}
public class Amazon {
    public static void main(String[] args) {
        int num[] = { 1, 8, 9, 5 };
        System.out.println(num[0] + " " + num[1]);
    }
}
public class Amazon {
    public static void main(String[] args) {
        int num[] = { 1, 8, 9, 5 };
        num[0] = 55;
        System.out.println(num[0] + " " + num[1]);
    }
}
public class Amazon {
    public static void main(String[] args) {
        int num[] = { 1, 8, 9, 5 };
        num[7] = 55;//error size equal 4
        System.out.println(num[0] + " " + num[1]);
    }
}
public class Amazon {
    public static void main(String[] args) {
        int num[] = { 1, 8, 9, 5 };
        System.out.println(num.length);
    }
}
public class Amazon {
    public static void main(String[] args) {
        double arr[] = new int[6];//Error
        System.out.println();
    }
}
public class Amazon {
    public static void main(String[] args) {
        double arr[] = new double[6];
        System.out.println(arr[0]);
    }
}
public class Amazon {
    public static void main(String[] args) {
        double arr[] = new double[6];
        System.out.println(arr[0]);
    }
}
public class Amazon {
    public static void main(String[] args) {
        boolean arr[] = new boolean[6];
        System.out.println(arr[1]);//false default
    }
}
public class Amazon {
    public static void main(String[] args) {
        char[] arr = new char[6];
        System.out.println(arr[1]);//Null means having no value
    }
}
public class Amazon {
    public static void main(String[] args) {
        char[] arr = new char[6];
        arr[0] = 'a';
        arr[1] = 'b';
        arr[2] = 'c';
        arr[3] = 'd';
        arr[4] = 'e';
        arr[5] = 'f';
        System.out.println(arr[1]);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String arr[] = new String[6];
        System.out.println(arr[0]);//null
    }
}
public class Amazon {
    public static void main(String[] args) {
        String arr1[] = new String[] { "Ali", "Ahmed", "Belal" };
        System.out.println(arr1[0]);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String arr1[] = { "Ali", "Ahmed", "Belal" };
        System.out.println(arr1[0]);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String arr[] = new String[] { "Ali", "Ahmed", "Belal" };
        System.out.println(arr[0]);
        System.out.println(arr[1]);
        System.out.println(arr[2]);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String arr[] = new String[] { "Ali", "Ahmed", "Belal" };
        for (int i = 0; i < arr.length; i++) {
            System.out.println(arr[i]);
        }
    }
}
public class Amazon {
    public static void main(String[] args) {
        String arr[] = new String[] { "Ali", "Ahmed", "Belal" };
        for (int i = 0; i < arr.length; i++) {//i must = 1.
            System.out.println(arr[i]);
        }
    }
}
public class Amazon {
    public static void main(String[] args) {
        String arr[] = new String[] { "Ali", "Ahmed", "Belal" };
        for (String i : arr) {
            System.out.println(i);
        }
    }
}
public class Amazon {
    public static void main(String[] args) {
        String arr[] = new String[] { "Ali", "Ahmed", "Belal" };
        for (String i : arr) {
            System.out.println(i);
        }
    }
}
public class Amazon {
    public static void main(String[] args) {
        int size=15;
        int  arr[]=new int[size];
    }
}
public class Amazon {
    public static void main(String[] args) {
        short size = 15;//not double jast size.
        int arr[] = new int[size];
    }
}
public class Amazon {
    public static void main(String[] args) {
        short size = 15;
        int arr[] = new int[size];
        arr[0]=15;
        System.out.println(arr[0]);
    }
}
import java.util.Scanner;
import jdk.tools.jlink.resources.plugins;
public class Amazon {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        short size = input.nextShort();
        int[] arr = new int[size];
        for (short i = 0; i < arr.length; i++) {
            arr[i] = input.nextInt();
        }
        System.out.print("[");
        for (int i : arr) {
            System.out.print(i + ",");
        }
        System.out.print("]");
    }
}











//Arrays (one_Dimensional Arrays)
/*
Write a java program to sum values of an array.
*/
public class Amazon {
    public static void main(String[] args) {
        int ahmedarr[] = { 1, 5, 8, 9 };
        int sum = 0;
        for (int i = 0; i < ahmedarr.length; i++) {
            sum = sum + ahmedarr[i];
        }
        System.out.println("The Sum=" + sum);
    }
}
//Arrays (one_Dimensional Arrays)
/*
Write a java program to sum values of an array.
*/
public class Amazon {
    public static void main(String[] args) {
        int ahmedarr[] = { 1, 5, 8, 9 };
        int sum = 0;
        for (int i = 0; i < ahmedarr.length; i++) {
            sum = sum + ahmedarr[i];//sum+=ahmedarr[i];
        }
        System.out.println("The Sum=" + sum);
    }
}
import java.util.Scanner;
/*
Write a Java program to calculate:
the average value of array elements.
*/
public class Amazon {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("Enter size number:");
        int size = input.nextInt();
        int arrnumber[] = new int[size], sum = 0;
        for (int i = 0; i < arrnumber.length; i++) {
            arrnumber[i] = input.nextInt();
        }
        for (int j = 0; j < arrnumber.length; j++) {
            sum += arrnumber[j];
        }
        System.out.println("The Average =="+(sum/size));
    }
}
import java.util.Scanner;
/*
Write a Java program to calculate:
the average value of array elements.
*/
public class Amazon {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("Enter size number:");
        int size = input.nextInt();
        int arrnumber[] = new int[size], sum = 0;
        for (int i = 0; i < arrnumber.length; i++) {
            arrnumber[i] = input.nextInt();
        }
        for (int j = 0; j < arrnumber.length; j++) {
            sum += arrnumber[j];
        }
        System.out.println("The Average ==" + (sum / size));
      //can double
    }
}
import java.util.Scanner;
/*
Write a Jave program to test: 
if an array contains a specific Value
*/
public class Amazon {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("Enter the specific num:");
        int num = input.nextInt();
        System.out.println("Enter the size:");
        int size = input.nextInt();
        int ahmed[] = new int[size];
        System.out.println("Enter the array values:");
        for (int i = 0; i < size; i++) {
            ahmed[i] = input.nextInt();
        }
        boolean f = false;
        for (int i : ahmed) {
            if (num == i) {
                f = true;
                break;
            }
        }
        System.out.println("array contains a specific value?");
        if (f) {
            System.out.println("Found");
        } else {
            System.out.println("Not Found");
        }
    }
}
/*
Write a Jave program to test: 
if an array contains a specific Value
*/
public class Amazon {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("Enter the specific num:");
        int num = input.nextInt();
        System.out.println("Enter the size:");
        int size = input.nextInt();
        int ahmed[] = new int[size];
        System.out.println("Enter the array values:");
        for (int i = 0; i < size; i++) {
            ahmed[i] = input.nextInt();
        }
        boolean f = false;
        for (int i : ahmed) {
            if (num == i) {
                f = true;
                break;
            }
        }
        System.out.println("array contains a specific value?");
        if (f) {
            System.out.println("Found");
        } else {
            System.out.println("Not Found");
        }
    }
}
import java.util.Scanner;
/*
Write a Java program to find the maximum
and minimum value of an array.
*/
public class Amazon {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("Enter the size:");
        int size = input.nextInt();
        int ahmedarr[] = new int[size];
        System.out.println("Enter the array elements:");
        for (int i = 0; i < ahmedarr.length; i++) {
            ahmedarr[i] = input.nextInt();
        }
        int minimum = ahmedarr[0], maxmum = ahmedarr[0];
        for (int i = 1; i < ahmedarr.length; i++) {
            if (ahmedarr[i] < minimum) {
                minimum = ahmedarr[i];
            }
            if (ahmedarr[i] > maxmum) {
                maxmum = ahmedarr[i];
            }
        }
        System.out.println("Minimum value==" + minimum);
        System.out.println("Maxmum value==" + maxmum);
    }
}
/*
Write a Java program to find the maximum
and minimum value of an array.
*/
public class Amazon {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("Enter the size:");
        int size = input.nextInt();
        int ahmedarr[] = new int[size];
        System.out.println("Enter the array elements:");
        for (int i = 0; i < ahmedarr.length; i++) {
            ahmedarr[i] = input.nextInt();
        }
        int minimum = ahmedarr[0], maxmum = ahmedarr[0];
        for (int i = 1; i < ahmedarr.length; i++) {
            if (ahmedarr[i] < minimum) {
                minimum = ahmedarr[i];
            }
            if (ahmedarr[i] > maxmum) {
                maxmum = ahmedarr[i];
            }
        }
        System.out.println("Minimum value==" + minimum);
        System.out.println("Maxmum value==" + maxmum);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Write a Java program to sort a numeric array.
*/
public class Amazon {
    public static void main(String[] args) {
        int ahmedarray[] = { 1, 2, 3, 4, 5, 6, 7, 8, -9 };
        Arrays.sort(ahmedarray);//arrangement
        for (int i = 0; i < ahmedarray.length; i++) {
            System.out.print(ahmedarray[i] + " ");
        }
    }
}//Arrays sort()arrangement.





import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char ahmedarr[] = new char[5];
        ahmedarr[0] = 'a';
        ahmedarr[1] = 'h';
        ahmedarr[2] = 'm';
        ahmedarr[3] = 'e';
        ahmedarr[4] = 'd';
        for (int i = 0; i < ahmedarr.length; i++) {
            System.out.print(ahmedarr[i]);
        }
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char ahmedarr[] = new char[5];
        ahmedarr[0] = 'a';
        ahmedarr[1] = 'h';
        ahmedarr[2] = 'm';
        ahmedarr[3] = 'e';
        ahmedarr[4] = 'd';
        System.out.println(ahmedarr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char ahmedarr[] = { 'a', 'h', 'm', 'e', 'd' };
        System.out.println(ahmedarr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char ahmedarr[] = { 97, 98 };
        System.out.println(ahmedarr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char ahmedarr[] = { 97, 98 };//using ASC code
        System.out.println(ahmedarr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char ahmedarr[] = { 65, 66 };// using ASC code
        System.out.println(ahmedarr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char ahmedarr[] = { 65, 66 };// using ASC code
        System.out.println(ahmedarr);
        System.out.println(((char)66);//Type Casting
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char ahmedarr[] = { 65, 66 };// using ASC code
        System.out.println(ahmedarr);
        System.out.println((char) 66);// Type Casting
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char ahmedarr[] = { 65, 66 };// using ASC code
        System.out.println(ahmedarr);
        System.out.println((char) 66);// Type Casting
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int size = input.nextInt();
        char arrchar[] = new char[size];
        arrchar = input.next().toCharArray();
        System.out.println(arrchar);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int size = input.nextInt();
        char arrchar[] = new char[size];
        arrchar = input.next().toCharArray();
        System.out.println(arrchar);
    }
}
import java.util.Arrays;
import java.util.Scanner;

/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[] = new char[6];
        Scanner input = new Scanner(System.in);
        arr = input.nextLine().toCharArray();
        System.out.println(arr);
    }
}
import java.util.Arrays;
import java.util.Scanner;

/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[] = new char[6];
        Scanner input = new Scanner(System.in);
        arr = input.nextLine().toCharArray();
        System.out.println(arr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[] = new char[20];
        Scanner input = new Scanner(System.in);
        String str = input.nextLine();
        arr = str.toCharArray();
        System.out.println(arr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[] = new char[20];
        Scanner input = new Scanner(System.in);
        String str = input.nextLine();
        arr = str.toCharArray();
        System.out.println(arr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[]=new char[]{'C','B','A'};
        Arrays.sort(arr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[] = new char[] { 'C', 'B', 'A' };
        Arrays.sort(arr);
        System.out.println(arr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[] = new char[] { 'C', 'B', 'A' };
        Arrays.sort(arr);
        System.out.println(arr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[] = new char[] { 'a', 'C', 'A' };
        Arrays.sort(arr);
        System.out.println(arr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[] = new char[] { 'a', 'b', 'c', 'd', 'e' };
        String str = new String(arr, 0, 2);
        System.out.println(str);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[] = new char[] { 'a', 'b', 'c', 'd', 'e' };
        String str = new String(arr, 2, 3);
        System.out.println(str);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[] = new char[] { 'a', 'b', 'c', 'd', 'e' };
        String str = new String(arr, 2, 3);
        System.out.println(str);
    }
}
import java.util.Arrays;
import java.util.Scanner;

/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[]=new char[]{'a','b','c','d','e'};
        String str="abcde";
    }
}

//array of char can Encrypt.






import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char ahmedarr[] = new char[5];
        ahmedarr[0] = 'a';
        ahmedarr[1] = 'h';
        ahmedarr[2] = 'm';
        ahmedarr[3] = 'e';
        ahmedarr[4] = 'd';
        for (int i = 0; i < ahmedarr.length; i++) {
            System.out.print(ahmedarr[i]);
        }
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char ahmedarr[] = new char[5];
        ahmedarr[0] = 'a';
        ahmedarr[1] = 'h';
        ahmedarr[2] = 'm';
        ahmedarr[3] = 'e';
        ahmedarr[4] = 'd';
        System.out.println(ahmedarr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char ahmedarr[] = { 'a', 'h', 'm', 'e', 'd' };
        System.out.println(ahmedarr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char ahmedarr[] = { 97, 98 };
        System.out.println(ahmedarr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char ahmedarr[] = { 97, 98 };//using ASC code
        System.out.println(ahmedarr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char ahmedarr[] = { 65, 66 };// using ASC code
        System.out.println(ahmedarr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char ahmedarr[] = { 65, 66 };// using ASC code
        System.out.println(ahmedarr);
        System.out.println(((char)66);//Type Casting
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char ahmedarr[] = { 65, 66 };// using ASC code
        System.out.println(ahmedarr);
        System.out.println((char) 66);// Type Casting
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char ahmedarr[] = { 65, 66 };// using ASC code
        System.out.println(ahmedarr);
        System.out.println((char) 66);// Type Casting
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int size = input.nextInt();
        char arrchar[] = new char[size];
        arrchar = input.next().toCharArray();
        System.out.println(arrchar);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int size = input.nextInt();
        char arrchar[] = new char[size];
        arrchar = input.next().toCharArray();
        System.out.println(arrchar);
    }
}
import java.util.Arrays;
import java.util.Scanner;

/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[] = new char[6];
        Scanner input = new Scanner(System.in);
        arr = input.nextLine().toCharArray();
        System.out.println(arr);
    }
}
import java.util.Arrays;
import java.util.Scanner;

/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[] = new char[6];
        Scanner input = new Scanner(System.in);
        arr = input.nextLine().toCharArray();
        System.out.println(arr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[] = new char[20];
        Scanner input = new Scanner(System.in);
        String str = input.nextLine();
        arr = str.toCharArray();
        System.out.println(arr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[] = new char[20];
        Scanner input = new Scanner(System.in);
        String str = input.nextLine();
        arr = str.toCharArray();
        System.out.println(arr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[]=new char[]{'C','B','A'};
        Arrays.sort(arr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[] = new char[] { 'C', 'B', 'A' };
        Arrays.sort(arr);
        System.out.println(arr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[] = new char[] { 'C', 'B', 'A' };
        Arrays.sort(arr);
        System.out.println(arr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[] = new char[] { 'a', 'C', 'A' };
        Arrays.sort(arr);
        System.out.println(arr);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[] = new char[] { 'a', 'b', 'c', 'd', 'e' };
        String str = new String(arr, 0, 2);
        System.out.println(str);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[] = new char[] { 'a', 'b', 'c', 'd', 'e' };
        String str = new String(arr, 2, 3);
        System.out.println(str);
    }
}
import java.util.Arrays;
import java.util.Scanner;
/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[] = new char[] { 'a', 'b', 'c', 'd', 'e' };
        String str = new String(arr, 2, 3);
        System.out.println(str);
    }
}
import java.util.Arrays;
import java.util.Scanner;

/*
Char Array.
*/
public class Amazon {
    public static void main(String[] args) {
        char arr[]=new char[]{'a','b','c','d','e'};
        String str="abcde";
    }
}

//array of char can Encrypt.






public class Amazon {
    static void printArray(int[] x) {
        for (int i = 0; i < x.length; i++) {
            System.out.println(x[i]);
        }

    }

    public static void main(String[] args) {
        int arr[] = { 1, 2, 3, 4 };
        printArray(arr);
    }
}
public class Amazon {
    static void printArray(int[] x) {
        for (int i = 0; i < x.length; i++) {
            System.out.println(x[i]);
        }

    }

    public static void main(String[] args) {
        int arr1[] = { 1, 2, 3, 4 };
        int arr2[] = { 5, 6, 7, 8 };
        printArray(arr2);
    }
}
public class Amazon {
    static void printArray(int[] x) {
        for (int i = 0; i < x.length; i++) {
            System.out.println(x[i]);
        }
    }
    public static void main(String[] args) {
        int arr1[] = { 1, 2, 3, 4 };
        int arr2[] = { 5, 6, 7, 8 };
        int x[] = new int[] { 1, 2, 3 };
        printArray(new int[] { 1, 2, 3 });
    }
}
public class Amazon {
    static void printArray(int[] x) {
        for (int i = 0; i < x.length; i++) {
            System.out.println(x[i]);
        }
    }
    public static void main(String[] args) {
        int arr1[] = { 1, 2, 3, 4 };
        int arr2[] = { 5, 6, 7, 8 };
        int x[] = new int[] { 1, 2, 3 };
        printArray(new int[] { 1, 2, 3 });
        printArray(x);
    }
}
import java.util.Scanner;

public class Amazon {

    static int[] getArray() {
        return new int[] { 20, 40, 60, 80 };
    }

    static void printArray(int[] x) {
        for (int i = 0; i < x.length; i++) {
            System.out.println(x[i]);
        }

    }

    public static void main(String[] args) {
        int z[] = getArray();
        printArray(z);
    }
}
import java.util.Scanner;

public class Amazon {

    static int[] getArray() {
        return new int[] { 20, 40, 60, 80 };
    }

    static void printArray(int[] x) {
        for (int i = 0; i < x.length; i++) {
            System.out.println(x[i]);
        }

    }

    public static void main(String[] args) {
        int z[] = getArray();
        printArray(z);
    }
}
import java.util.Scanner;
public class Amazon {
    static int[] getArray() {
        return new int[] { 20, 40, 60, 80 };
    }

    static void printArray(int[] x) {
        for (int i = 0; i < x.length; i++) {
            System.out.println(x[i]);
        }

    }
    public static void main(String[] args) {
        int z[] = getArray();
        printArray(z);
    }
}
import java.util.Scanner;
public class Amazon {
    public static void main(String[] args) {
        int arr1[] = { 1, 2, 3 };
        int arr2[] = { 40, 50, 60 };
        arr1 = arr2;
        arr2[0] = 100;
        arr1[1] = 500;
        System.out.println(arr1[0]);
        System.out.println(arr2[2]);
    }
}
import java.util.Scanner;
public class Amazon {
    static void setArray(int[] x) {
        x[0] = 50;
    }
    public static void main(String[] args) {
        int arr1[] = { 1, 2, 3, 4 };
        setArray(arr1);
        System.out.println(arr1[0]);
    }
}
import java.util.Scanner;
public class Amazon {
    static void setArray(int[] x) {
        x[0] = 50;
    }
    public static void main(String[] args) {
        int arr1[] = { 1, 2, 3, 4 };
        setArray(arr1);
        System.out.println(arr1[0]);
    }
}
import java.util.Scanner;
public class Amazon {
    static void setArray(int[] x) {
        x[0] = 50;
    }
    static void serVar(int x) {
        x = 10;
    }
    public static void main(String[] args) {
        int arr1[] = { 1, 2, 3, 4 };
        setArray(arr1);
        System.out.println(arr1[0]);
        int y = 5;
        serVar(y);
        System.out.println(y);
    }
}
import java.util.Scanner;
public class Amazon {
    static void setArray(int[] x) {
        x[0] = 50;
    }
    static void serVar(int x) {//&cant use in java
        x = 10;
    }
    public static void main(String[] args) {
        int arr1[] = { 1, 2, 3, 4 };
        setArray(arr1);
        System.out.println(arr1[0]);
        int y = 5;
        serVar(y);
        System.out.println(y);
    }
}
import java.util.Scanner;
public class Amazon {
    public static void main(String[] args) {
        int arr1[] = { 1, 2, 3 };
        int arr2[] = { 40, 50, 60 };
        int arr3[] = { 40, 50, 60 };
        arr1 = arr2 = arr3;
        arr1[0] = 0;
        System.out.println(arr1[0]);
        System.out.println(arr2[0]);
        System.out.println(arr3[0]);
    }
}
import java.util.Scanner;
public class Amazon {
    public static void main(String[] args) {
        int arr1[] = { 1, 2, 3 };
        int arr2[] = { 40, 50, 60 };
        int arr3[] = { 40, 50, 60 };
        arr1 = arr2 = arr3;
        arr1[0] = 0;
        System.out.println(arr1[0]);
        System.out.println(arr2[0]);
        System.out.println(arr3[0]);
    }
}


import java.util.Scanner;

public class Amazon {
    public static void main(String[] args) {
        int arr[][]=new int[3][];
        arr[0]=new int[4];
        arr[1]=new int[4];
        arr[2]=new int[4];

        arr[0][0]=1;
        arr[0][1]=2;
        arr[0][2]=3;
        arr[0][3]=4;

        arr[1][0]=10;
        arr[1][1]=20;
        arr[1][2]=30;
        arr[1][3]=40;

        arr[2][0]=50;
        arr[2][1]=60;
        arr[2][2]=70;
        arr[2][3]=80;
    }
}
import java.util.Scanner;
public class Amazon {
    public static void main(String[] args) {
        int arr[][] = new int[3][4];
        /*
         * arr[0]=new int[4];
         * arr[1]=new int[4];
         * arr[2]=new int[4];
         */
        arr[0][0] = 1;
        arr[0][1] = 2;
        arr[0][2] = 3;
        arr[0][3] = 4;

        arr[1][0] = 10;
        arr[1][1] = 20;
        arr[1][2] = 30;
        arr[1][3] = 40;

        arr[2][0] = 50;
        arr[2][1] = 60;
        arr[2][2] = 70;
        arr[2][3] = 80;
    }
}
import java.util.Scanner;
public class Amazon {
    public static void main(String[] args) {
        int arr[][] = new int[][]{
            {1,5,8},
            {5,6},
            {4}};
    }
}
import java.util.Scanner;
public class Amazon {
    public static void main(String[] args) {
        int arr[][] = { { 1, 5, 8 }, { 5, 6 }, { 4 } };
        System.out.println(arr.length);
    }
}
import java.util.Scanner;
public class Amazon {
    public static void main(String[] args) {
        int arr[][] = { { 1, 5, 8 }, { 5, 6 }, { 4 } };
        System.out.println(arr.length);
        System.out.println(arr[0].length);
        System.out.println(arr[1].length);
        System.out.println(arr[2].length);
    }
}
import java.util.Scanner;
public class Amazon {
    public static void main(String[] args) {
        int arr[][] = { { 1, 5, 8 }, { 5, 6 }, { 4 } };
        System.out.println(arr.length);
        System.out.println(arr[0].length);
        System.out.println(arr[1].length);
        System.out.println(arr[2].length);
    }
}
import java.util.Scanner;
public class Amazon {
    public static void main(String[] args) {
        int[][] arr = { { 1, 5, 8 }, { 5, 6 }, { 4 } };
        for (int i = 0; i < arr[0].length; i++) {
            System.out.println(arr[i] + " ");
        }
    }
}
import java.util.Scanner;
public class Amazon {
    public static void main(String[] args) {
        int[][] arr = { { 1, 5, 8 }, { 5, 6 }, { 4 } };
        for (int i = 0; i < arr[0].length; i++) {
            System.out.println(arr[0][i] + " ");
        }
    }
}
public class Amazon {
    public static void main(String[] args) {
        int[][] arr = { { 1, 5, 8 }, { 5, 6 }, { 4 } };
        for (int row = 0; row < arr.length; row++) {
            for (int col = 0; col < arr[row].length; col++) {
                System.out.print(arr[row][col] + " ");
            }
            System.out.println();
        }
    }
}
public class Amazon {
    public static void main(String[] args) {
        int[][] arr = { { 1, 5, 8 }, { 5, 6 }, { 4 } };
        for (int row = 0; row < arr.length; row++) {
            for (int col = 0; col < arr[row].length; col++) {
                System.out.print(arr[row][col] + " ");
            }
            System.out.println();
        }
    }
}
public class Amazon {
    public static void main(String[] args) {
        int[][] arr = { { 1, 5, 8 }, { 5, 6 }, { 4 } };
        for (int[] r : arr) {
            for (int c : r) {
                System.out.print(c + " ");
            }
            System.out.println();
        }
    }
}
public class Amazon {
    public static void main(String[] args) {
        int[][] arr = { { 1, 3, 5 }, { 2, 4, 6 } };// 2 X 3 transpose matrix.
        for (int i = 0; i < arr.length; i++) {
            for (int j = 0; j < arr[i].length; j++) {
                System.out.print(arr[i][j] + " ");
            }
            System.out.println();
        }
    }
}
public class Amazon {
    public static void main(String[] args) {
        int[][] arr = { { 1, 3, 5 }, { 2, 4, 6 } };// 2 X 3 transpose matrix.
        for (int i = 0; i < 3; i++) {
            for (int j = 0; j < 2; j++) {
                System.out.print(arr[j][i] + " ");
            }
            System.out.println();
        }
    }
}
public class Amazon {
    public static void main(String[] args) {
        int[][] arr = { { 1, 3, 5 }, { 2, 4, 6 } };// 2 X 3 transpose matrix.
        for (int i = 0; i < 3; i++) {
            for (int j = 0; j < 2; j++) {
                System.out.print(arr[j][i] + " ");
            }
            System.out.println();
        }
    }
}
public class Amazon {

    static void print(int a[][]) {
        for (int i = 0; i < a.length; i++) {
            for (int j = 0; j < a[i].length; j++) {
                System.out.print(a[i][j] + " ");
            }
            System.out.println();
        }
    }

    public static void main(String[] args) {
        int[][] arr = { { 1, 3, 5 }, { 2, 4, 6 } };
        print(arr);

    }
}
public class Amazon {

    static void print(int a[][]) {
        for (int i = 0; i < a.length; i++) {
            for (int j = 0; j < a[i].length; j++) {
                System.out.print(a[i][j] + " ");
            }
            System.out.println();
        }
    }

    public static void main(String[] args) {
        int[][] arr = { { 1, 3, 5 }, { 2, 4, 6 } };
        print(arr);

    }
}
public class Amazon {

    static int[][] get2Array() {
        int arr[][]=new int [2][3];
        return arr;
    }

    public static void main(String[] args) {
        



    }
}




public class Amazon {
    public static void main(String[] args) {
        String str = "ABCD";
        System.out.println(str);
    }
}
public class Amazon {

    public static void main(String[] args) {
        String str = new String("ABCD");
        System.out.println(str);
    }
}
public class Amazon {

    public static void main(String[] args) {
        String str = new String("ABCD");
        System.out.println(str);
        //class methods
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str = "Hello";
        str = str.concat(str);
        System.out.println(str);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str = "Hello";
        str = str.concat(", I'm Ahmed");
        System.out.println(str);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str = "Hello";
        str = str + ", I'm Ahmed";
        System.out.println(str);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str = "Hello";
        str = str + ", I'm Ahmed";
        System.out.println(str);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str1 = "Hello";//have same address
        String str2 = "Hello";//have same address
        System.out.println(str1);
        System.out.println(str2);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str1 = "Hello";// have same address
        String str2 = "Hello";// have same address
        String str3 = "AAAAA";
        str1 = "12345";
        System.out.println(str1);
        System.out.println(str2);
        // System.out.println(str3);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str1 = "Hello";// have same address
        String str2 = "Hello";// have same address
        String str3 = "AAAAA";
        str1 = "12345";
        System.out.println(str1);
        System.out.println(str2);
        // System.out.println(str3);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str1 = "Hello";// have same address
        String str2 = "Hello";// have same address
        String str3 = "AAAAA";
        str1 = "12345";
        System.out.println(str1);
        System.out.println(str2);
        // System.out.println(str3);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "ABCD";
        String s2 = "ABCe";
        System.out.println(s1.compareTo(s2));
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "ABCD";
        String s2 = "ABCe";
        System.out.println(s1.compareTo(s2));
        /*
         * s1>s2=+num, s1<s2=-num, s1=s2=0
         */
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "ABCD";
        String s2 = "ABCe";
        System.out.println(s1.compareTo(s2));
        /*
         * s1>s2=+num, s1<s2=-num, s1=s2=0
         */
       System.out.println((int) 'A' + (int) 'B' + (int) 'C' + (int) 'D');
       System.out.println((int) 'A' + (int) 'B' + (int) 'C' + (int) 'e');
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "ABCD";
        String s2 = "ABCe";
        System.out.println(s1.compareTo(s2));
        System.out.println((int) 'D');
        System.out.println((int) 'e');
        /*
         * s1>s2=+num, s1<s2=-num, s1=s2=0
         */
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "ABCe";
        String s2 = "ABCe";
        System.out.println(s1.compareTo(s2));

    }
}
public class Amazon {
    public static void main(String[] args) {
        String str1 = "   hello   ";
        System.out.println(str1 + "how are you");
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str1 = "   hello   ";
        System.out.println(str1.trim() + "how are you");
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str1 = "   hello   ";
        System.out.println(str1.trim() + "how are you");
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str1 = "HEllo I'm Belal";
        System.out.println(str1.toLowerCase());
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str1 = "HEllo I'm Belal";
        System.out.println(str1.toLowerCase());
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str1 = "HEllo I'm Belal";
        System.out.println(str1.toLowerCase());
    }
}
public class Amazon {
    public static void main(String[] args) {
        int n = 10;
        String str1 = String.valueOf(n);
        System.out.println(str1);
    }
}
public class Amazon {
    public static void main(String[] args) {
        int n = 10;
        String str1 = n + "";
        System.out.println(str1);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "HELLO";
        String s2 = "HELLO";
        System.out.println(s1 == s2);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "HELLO";
        String s2 = "HELLO";
        System.out.println(s1 == s2);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = new String("HELLO");
        String s2 = new String("HELLO");
        System.out.println(s1 == s2);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = new String("HELLO");
        String s2 = new String("HELLO");
        System.out.println(s1 == s2);//address
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = new String("HELLO");
        String s2 = new String("HELLO");
        System.out.println(s1.equals(s2));//address
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = new String("HELLO");
        String s2 = new String("HELLO");
        System.out.println(s1.equals(s2));
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = new String("HELLO");
        String s2 = new String("HELLO");
        s1 = s2;
        System.out.println(s1 == s2);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = new String("HELLO");
        String s2 = new String("HELLO");
        s1 = s2;
        System.out.println(s1 == s2);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "HELLO";
        String s2 = "hello";
        System.out.println(s1.equalsIgnoreCase(s2));
    }
}
public class Amazon {

    public static void main(String[] args) {
        String s1 = "HELLO";
        String s2 = "hello";
        System.out.println(s1.equalsIgnoreCase(s2));
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1="Hey, Welcome to c++ course";
        String replaceString=s1.replace(target, replacement)
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "Hey, Welcome to c++ course";
        String replaceString = s1.replace("c++", "JAVA");
        System.out.println(replaceString);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "Hey, Welcome to c++ course";
        String replaceString = s1.replace("c++", "JAVA");
        System.out.println(replaceString);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "Hey, Welcome to c++ course c++";
        String replaceString = s1.replace("c++", "JAVA");
        System.out.println(replaceString);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String name="hello how are you doing";
        System.out.println(name.contains("how are you"));
        System.out.println(name.contains("hello"));
        System.out.println(name.contains("fine"));
    }
}
public class Amazon {
    public static void main(String[] args) {
        String name = "hello how are you doing";
        System.out.println(name.contains("how are you"));
        System.out.println(name.contains("hello"));
        System.out.println(name.contains("fine"));
    }
}
public class Amazon {
    public static void main(String[] args) {
        String name = "hello how are you doing";
        System.out.println(name.contains(" you"));
        System.out.println(name.contains("hello"));
        System.out.println(name.contains("fine"));
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "hello how are you";
        System.out.println(s1.endsWith("u"));
        System.out.println(s1.endsWith("you"));
        System.out.println(s1.endsWith("how"));
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "hello how are you";
        System.out.println(s1.endsWith("u"));
        System.out.println(s1.endsWith("you"));
        System.out.println(s1.endsWith("how"));
    }
}
public class Amazon {
    public static void main(String[] args) {
        String ahmed1 = "Ahmed Abdelmoneim";
        System.out.println(ahmed1.substring(0));
    }
}
public class Amazon {
    public static void main(String[] args) {
        String ahmed1 = "Ahmed Abdelmoneim";
        System.out.println(ahmed1.substring(2));
    }
}
public class Amazon {
    public static void main(String[] args) {
        String ahmed1 = "Ahmed Abdelmoneim";
        System.out.println(ahmed1.substring(2, 8));
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str = "AA-BB-CC-DD-EE-FF";
        for (String val : str.split("-")) {
            System.out.println(val);
        }
        ;
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str = "AA BB CC DD EE FF";
        for (String val : str.split(" ")) {
            System.out.println(val);
        }
    }
}




















public class Amazon {
    public static void main(String[] args) {
        String str = "ABCD";
        System.out.println(str);
    }
}
public class Amazon {

    public static void main(String[] args) {
        String str = new String("ABCD");
        System.out.println(str);
    }
}
public class Amazon {

    public static void main(String[] args) {
        String str = new String("ABCD");
        System.out.println(str);
        //class methods
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str = "Hello";
        str = str.concat(str);
        System.out.println(str);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str = "Hello";
        str = str.concat(", I'm Ahmed");
        System.out.println(str);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str = "Hello";
        str = str + ", I'm Ahmed";
        System.out.println(str);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str = "Hello";
        str = str + ", I'm Ahmed";
        System.out.println(str);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str1 = "Hello";//have same address
        String str2 = "Hello";//have same address
        System.out.println(str1);
        System.out.println(str2);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str1 = "Hello";// have same address
        String str2 = "Hello";// have same address
        String str3 = "AAAAA";
        str1 = "12345";
        System.out.println(str1);
        System.out.println(str2);
        // System.out.println(str3);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str1 = "Hello";// have same address
        String str2 = "Hello";// have same address
        String str3 = "AAAAA";
        str1 = "12345";
        System.out.println(str1);
        System.out.println(str2);
        // System.out.println(str3);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str1 = "Hello";// have same address
        String str2 = "Hello";// have same address
        String str3 = "AAAAA";
        str1 = "12345";
        System.out.println(str1);
        System.out.println(str2);
        // System.out.println(str3);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "ABCD";
        String s2 = "ABCe";
        System.out.println(s1.compareTo(s2));
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "ABCD";
        String s2 = "ABCe";
        System.out.println(s1.compareTo(s2));
        /*
         * s1>s2=+num, s1<s2=-num, s1=s2=0
         */
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "ABCD";
        String s2 = "ABCe";
        System.out.println(s1.compareTo(s2));
        /*
         * s1>s2=+num, s1<s2=-num, s1=s2=0
         */
       System.out.println((int) 'A' + (int) 'B' + (int) 'C' + (int) 'D');
       System.out.println((int) 'A' + (int) 'B' + (int) 'C' + (int) 'e');
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "ABCD";
        String s2 = "ABCe";
        System.out.println(s1.compareTo(s2));
        System.out.println((int) 'D');
        System.out.println((int) 'e');
        /*
         * s1>s2=+num, s1<s2=-num, s1=s2=0
         */
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "ABCe";
        String s2 = "ABCe";
        System.out.println(s1.compareTo(s2));

    }
}
public class Amazon {
    public static void main(String[] args) {
        String str1 = "   hello   ";
        System.out.println(str1 + "how are you");
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str1 = "   hello   ";
        System.out.println(str1.trim() + "how are you");
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str1 = "   hello   ";
        System.out.println(str1.trim() + "how are you");
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str1 = "HEllo I'm Belal";
        System.out.println(str1.toLowerCase());
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str1 = "HEllo I'm Belal";
        System.out.println(str1.toLowerCase());
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str1 = "HEllo I'm Belal";
        System.out.println(str1.toLowerCase());
    }
}
public class Amazon {
    public static void main(String[] args) {
        int n = 10;
        String str1 = String.valueOf(n);
        System.out.println(str1);
    }
}
public class Amazon {
    public static void main(String[] args) {
        int n = 10;
        String str1 = n + "";
        System.out.println(str1);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "HELLO";
        String s2 = "HELLO";
        System.out.println(s1 == s2);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "HELLO";
        String s2 = "HELLO";
        System.out.println(s1 == s2);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = new String("HELLO");
        String s2 = new String("HELLO");
        System.out.println(s1 == s2);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = new String("HELLO");
        String s2 = new String("HELLO");
        System.out.println(s1 == s2);//address
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = new String("HELLO");
        String s2 = new String("HELLO");
        System.out.println(s1.equals(s2));//address
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = new String("HELLO");
        String s2 = new String("HELLO");
        System.out.println(s1.equals(s2));
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = new String("HELLO");
        String s2 = new String("HELLO");
        s1 = s2;
        System.out.println(s1 == s2);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = new String("HELLO");
        String s2 = new String("HELLO");
        s1 = s2;
        System.out.println(s1 == s2);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "HELLO";
        String s2 = "hello";
        System.out.println(s1.equalsIgnoreCase(s2));
    }
}
public class Amazon {

    public static void main(String[] args) {
        String s1 = "HELLO";
        String s2 = "hello";
        System.out.println(s1.equalsIgnoreCase(s2));
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1="Hey, Welcome to c++ course";
        String replaceString=s1.replace(target, replacement)
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "Hey, Welcome to c++ course";
        String replaceString = s1.replace("c++", "JAVA");
        System.out.println(replaceString);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "Hey, Welcome to c++ course";
        String replaceString = s1.replace("c++", "JAVA");
        System.out.println(replaceString);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "Hey, Welcome to c++ course c++";
        String replaceString = s1.replace("c++", "JAVA");
        System.out.println(replaceString);
    }
}
public class Amazon {
    public static void main(String[] args) {
        String name="hello how are you doing";
        System.out.println(name.contains("how are you"));
        System.out.println(name.contains("hello"));
        System.out.println(name.contains("fine"));
    }
}
public class Amazon {
    public static void main(String[] args) {
        String name = "hello how are you doing";
        System.out.println(name.contains("how are you"));
        System.out.println(name.contains("hello"));
        System.out.println(name.contains("fine"));
    }
}
public class Amazon {
    public static void main(String[] args) {
        String name = "hello how are you doing";
        System.out.println(name.contains(" you"));
        System.out.println(name.contains("hello"));
        System.out.println(name.contains("fine"));
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "hello how are you";
        System.out.println(s1.endsWith("u"));
        System.out.println(s1.endsWith("you"));
        System.out.println(s1.endsWith("how"));
    }
}
public class Amazon {
    public static void main(String[] args) {
        String s1 = "hello how are you";
        System.out.println(s1.endsWith("u"));
        System.out.println(s1.endsWith("you"));
        System.out.println(s1.endsWith("how"));
    }
}
public class Amazon {
    public static void main(String[] args) {
        String ahmed1 = "Ahmed Abdelmoneim";
        System.out.println(ahmed1.substring(0));
    }
}
public class Amazon {
    public static void main(String[] args) {
        String ahmed1 = "Ahmed Abdelmoneim";
        System.out.println(ahmed1.substring(2));
    }
}
public class Amazon {
    public static void main(String[] args) {
        String ahmed1 = "Ahmed Abdelmoneim";
        System.out.println(ahmed1.substring(2, 8));
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str = "AA-BB-CC-DD-EE-FF";
        for (String val : str.split("-")) {
            System.out.println(val);
        }
        ;
    }
}
public class Amazon {
    public static void main(String[] args) {
        String str = "AA BB CC DD EE FF";
        for (String val : str.split(" ")) {
            System.out.println(val);
        }
    }
}




















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