package com.mycompany.areaofcircle;

import java.util.Scanner;
public class Areaofcircle {
    
    //Lab 2,   Question 1.

    public static void main(String[] args) {
        //required variables:- radius, pi
        //pi is constant= 3.14
        
//input step.        
        final double pi = 3.14;
        
        //ask user to enter radius number.
        Scanner read = new Scanner(System.in);
        System.out.println("Enter the radius of the circle: ");
        double radius = read.nextDouble();
        
//procesing step.
        double area = pi*radius*radius;
        
        System.out.println("The area of circle is "+area);
        
        
    }
}