Swap Number

SwapNumber.java

package com.app.interviews;

public class SwapNumber {

    public static void main(String args[]) {

        int x = 10;
        int y = 20;

        x = x + y;
        y = x - y;
        x = x - y;

        System.out.println(x);
        System.out.println(y);
    }
}