Swap Numbers Without Using Third Variable Java Example

public class SwapElements{

   

          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("After Swapping");

                  System.out.println("Value of num1 is :" + num1);

                  System.out.println("Value of num2 is :" +num2);

          }

   

   

  }

   

  Output

  Before Swapping

  Value of num1 is :40

  Value of num2 is :50

  After Swapping

  Value of num1 is :50

  Value of num2 is :40