Question

WAP to swap 2 numbers without using 3rd variable

Answer 1

package com.java2novice.algos;

public class MySwapingTwoNumbers {

public static void main(String a[]){
int x = 10;
int y = 20;
System.out.println("Before swap:");
System.out.println("x value: "+x);
System.out.println("y value: "+y);
x = x+y;
y=x-y;
x=x-y;
System.out.println("After swap:");
System.out.println("x value: "+x);
System.out.println("y value: "+y);
}
}

Output:
Before swap:
x value: 10
y value: 20
After swap:
x value: 20
y value: 10