Swap Numbers Without Using Third Variable Java Example

1. /*
2.         Swap Numbers Without Using Third Variable Java Example
3.         This Swap Numbers Java Example shows how to
4.         swap value of two numbers without using third variable using java.
5. */
6.  
7. public class SwapElementsWithoutThirdVariableExample {
8.  
9.         public static void main(String[] args) {
10.                
11.                 int num1 = 10;
12.                 int num2 = 20;
13.                
14.                 System.out.println("Before Swapping");
15.                 System.out.println("Value of num1 is :" + num1);
16.                 System.out.println("Value of num2 is :" +num2);
17.                
18.                 //add both the numbers and assign it to first
19.                 num1 = num1 + num2;
20.                 num2 = num1 - num2;
21.                 num1 = num1 - num2;
22.                
23.                 System.out.println("Before Swapping");
24.                 System.out.println("Value of num1 is :" + num1);
25.                 System.out.println("Value of num2 is :" +num2);
26.         }
27.  
28.  
29. }
30.  
31. /*
32. Output of Swap Numbers Without Using Third Variable example would be
33. Before Swapping
34. Value of num1 is :10
35. Value of num2 is :20
36. Before Swapping
37. Value of num1 is :20
38. Value of num2 is :10
39. */