Program to swap two numbers without third variable using C#

C# Programming Language Operators in C# Language (Article) Operators in C# Language (Program)

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Program:

using System;  
  public class SwapExample  
   {  
     public static void Main(string[] args)  
      {  
       int  a=5, b=10;            
       Console.WriteLine("Before swap a= "+a+" b= "+b);    
       a=a+b; //a=15 (5+10)      
       b=a-b; //b=5 (15-10)      
       a=a-b; //a=10 (15-5)   
       Console.Write("After swap a= "+a+" b= "+b);       
      }  
  }  

Output:

Before swap a= 5 b= 10     
After swap a= 10 b= 5

Explanation:

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