WAP in java to swap 2 nos without using 3rd variable.

//Swap 2 nos without the use of 3rd variable.

import java.util.Scanner;

public class Swap {

public static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int a,b;

System.out.println("Enter 2 nos:");
a=sc.nextInt();
b=sc.nextInt();

System.out.println("Before Swapping...a="+a+" b="+b);
a=a+b;
b=a-b;
a=a-b;

System.out.println("After swapping...a="+a+" b="+b);
}
}