README.md

Description

Do you think it is possible to swap values between two variables without using a third temporary variable? What? No? Yes? Well, the answer is...YES. Take a look at the code and don't forget to vote!

More Info

Submitted On
By	FAzle AreFin
Level	Beginner
User Rating	4.7 (28 globes from 6 users)
Compatibility	Java (JDK 1.1), Java (JDK 1.2)
Category	Calculators & Science
World	Java
Archive File

Source Code

/*
	Swap Magic
	Swaps values between two variables without using a third temporary variable
	Programmer: Fazle Arefin
*/
public class SwapMagic {
	public static void main(String args[]) {
		// declare and initialize two variables
		int a = 10;
 		int b = 20;
 		System.out.println("Before swapping a = " + a + " and b = " + b);
 		a = a + b;
 		b = a - b;
 		a= a - b;
 		/*
 			instead of + and - you can use * and / respectively
 			a = a * b;
 			b = a / b;
 			a= a / b;
 			instead of + and - or * and / you can use the XOR operator ^
 			but this restricts you to only swapping integers
 			a = a ^ b;
 			b = a ^ b;
 			a= a ^ b;
 		*/
 		System.out.println("Before swapping a = " + a + " and b = " + b);
 }
}