reverse line

import java.util.*;
public class Main  {
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        System.out.println("Enter a string");
        String str=sc.nextLine();
        String rev = "";
        for(int i=str.length()-1;i>=0;i--){
            rev = rev + str.charAt(i);
        }
            System.out.println(rev);
        }
}