Swap Magic

				
//**************************************
// Name: Swap Magic
// 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!
// By: FAzle AreFin
//
//This code is copyrighted and has// limited warranties.Please see http://www.Planet-Source-Code.com/vb/scripts/ShowCode.asp?txtCodeId=2973&lngWId=2//for details.//**************************************

/*	
	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);
 }
}