write a program in java to display the number after swapping without using third variable

To swap two numbers without using a third variable in Java, you can follow these steps:

1. Declare and initialize two variables, let's say a and b, with the numbers you want to swap.
2. Print the original values of a and b for reference.
3. Perform the swap using the following steps:
   • Assign the sum of a and b to a.
   • Assign the difference between the new value of a and the original value of b to b.
   • Assign the difference between the original value of a and the new value of b to a.
4. Print the swapped values of a and b.

Here's the code that implements the above steps:

public class SwapNumbers {
    public static void main(String[] args) {
        int a = 10;
        int b = 20;

        System.out.println("Before swapping:");
        System.out.println("a = " + a);
        System.out.println("b = " + b);

        // Swapping without using a third variable
        a = a + b;
        b = a - b;
        a = a - b;

        System.out.println("After swapping:");
        System.out.println("a = " + a);
        System.out.println("b = " + b);
    }
}

When you run this program, it will display the numbers after swapping without using a third variable.