Introduction

The given below code swaps two given values of variables without using the third variable in C#.

namespace CDEMO.

{
class Program
{
static void Main(string[] args)
{
int first,second ;
first = 1;
second = 2;
first = first + second;
second = first - second;
first = first - second;
Console.WriteLine(first.ToString());
Console.WriteLine(second.ToString());
Console.ReadLine();
}
}
}