Java program to reverse a number

PROGRAM:

import java.util.Scanner;
public class ReverseNumber {
    static Scanner scan=new Scanner(System.in);
    public static void main(String [] args){
        int num,rev=0;
        System.out.println("Enter a number");
        num=scan.nextInt();
        while(num!=0)
        {
            rev=rev*10+num%10;
            num=num/10;
        }
        System.out.println("Reverse of number= "+rev);
    }

}

OUTPUT:

Enter a number
1234
Reverse of number= 4321