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);

                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);
        }