Swap Two Numbers using XOR in Java - The Coding Shala

Home >> Java Program >> Swap Two Numbers using XOR

 In this post, we will learn how to Swap Two Numbers using XOR and will write a Java Program for the same.

Java Program to Swap Two Numbers using XOR

Swap two numbers without using an additional variable.

Example:
Input: a = 10;
          b = 20;
Output: a = 20;
             b = 10;

We can use XOR to swap the numbers.

Java Program: 

public class SwapTwoNumbers {
	public static void main(String[] args) {
		int a = 10;
		int b = 20;
		System.out.println("Before swap");
		System.out.println("a: " + a);
		System.out.println("b: " + b);
		
		//swap using xor
		a = a ^ b;
		b = a ^ b;
		a = a ^ b;
		
		System.out.println("After swap");
		System.out.println("a: " + a);
		System.out.println("b: " + b);
	}
}

Output: 

Before swap
a: 10
b: 20
After swap
a: 20
b: 10


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