Swap Numbers Without Using Third Variable

/*
	Swap Numbers Without Using Third Variable Java Example
	This Swap Numbers Java Example shows how to 
	swap value of two numbers without using third variable using java.
*/
 
public class SwapElementsWithoutThirdVariableExample {
 
	public static void main(String[] args) {
 
		int num1 = 10;
		int num2 = 20;
 
		System.out.println("Before Swapping");
		System.out.println("Value of num1 is :" + num1);
		System.out.println("Value of num2 is :" +num2);
 
		//add both the numbers and assign it to first
		num1 = num1 + num2;
		num2 = num1 - num2;
		num1 = num1 - num2;
 
		System.out.println("Before Swapping");
		System.out.println("Value of num1 is :" + num1);
		System.out.println("Value of num2 is :" +num2);
	}
 
 
}
 
/*
Output of Swap Numbers Without Using Third Variable example would be
Before Swapping
Value of num1 is :10
Value of num2 is :20
Before Swapping
Value of num1 is :20
Value of num2 is :10
*/