Swapping of Two Values without using Third Variable

Using signs + and - for swapping of two values.

Using signs + and - for swapping of two values.

using system;

namespace TestConsole
{
    class Program
    {
        static void Main()
        {
            int a = 10;
            int b = 20;
            Console.write("After swap a = {0} and b = {1}", a, b);
            a = a + b; // a * b
            b = a - b; // a / b
            a = a - b; // a / b
            Console.Write("After swap a = {0} and b = {1}", a, b);
        }
    }
}