---
title: "Swap Two integers variable values without using the third variable."  
description: "Swap Two integers variable values without using the third variable."  
author: "Ahnkar Misra"  
published: 2023-02-02  
updated: 2023-06-15  
canonical: https://www.mindstick.com/forum/157371/swap-two-integers-variable-values-without-using-the-third-variable  
category: "c#"  
tags: ["c#", "java", "programming language"]  
reading_time: 3 minutes  

---

# Swap Two integers variable values without using the third variable.

How to [swap](https://www.mindstick.com/forum/34027/how-to-swap-the-values-of-two-columns-in-sql-server) Two integers [variable values](https://www.mindstick.com/interview/22795/swap-the-two-variable-values-without-taking-third-variable) without using a [third variable](https://www.mindstick.com/forum/236/how-can-i-swap-two-variables-without-using-a-third-variable)?

## Replies

### Reply by Aryan Kumar

Sure, here is a C# code that swaps two integers without using a third variable:

C#

```plaintext
using System;

public class SwapExample
{
    public static void Main(string[] args)
    {
        int x = 10;
        int y = 20;

        // Swap x and y without using a third variable.
        x = x + y;
        y = x - y;
        x = x - y;

        Console.WriteLine("x = {0}, y = {1}", x, y);
    }
}
```

This code works by adding x and y together, then storing the result in x. Then, it subtracts y from the result, and stores the result in y. Finally, it subtracts x from the result, and stores the result in x. This effectively swaps the [values](https://www.mindstick.com/forum/327/sum-textbox-values) of x and y without using a third variable.

Here is an explanation of how the code works:

- The using System; statement imports the System namespace, which contains the Console class.
- The public class SwapExample statement defines a class called SwapExample.
- The public static void Main(string[] args) statement defines a method called Main that is the entry point for the program.
- The int x = 10; statement declares an integer variable called x and initializes it to 10.
- The int y = 20; statement declares an integer variable called y and initializes it to 20.
- The x = x + y; statement adds y to x and stores the result in x.
- The y = x - y; statement subtracts y from x and stores the result in y.
- The x = x - y; statement subtracts x from y and stores the result in x.
- The Console.WriteLine("x = {0}, y = {1}", x, y); statement prints the values of x and y to the console.
- The }``` statement closes theMain` method.
- The }``` statement closes theSwapExample` class.

### Reply by Ravi Vishwakarma

There is a simple C# program to swap to an integer without using a [third](https://yourviews.mindstick.com/story/4957/the-significance-of-the-third-eye-in-hinduism-more-than-just-a-symbol) [variable](https://www.mindstick.com/articles/1807/objective-c-data-types-variables-object-creation).

```cs
using System;

namespace HelloWorld
{
  class Program
  {
    static void Main(string[] args)
    {
      Program.SwapInteger();
      Console.ReadLine();
    }
      public static void SwapInteger()
      {
          int a = 10;
          int b = 5;
          Console.WriteLine('a = {0}, b = {1}', a, b);
          a = a + b; // Now a = 15
          b = a - b; // Now b = 15-5=10
          a = a - b; // Now a = 15-10=5
          Console.WriteLine('a = {0}, b = {1}', a, b);
      }
  }
}

Output: a = 10, b = 5
		a = 5, b = 10
```


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Original Source: https://www.mindstick.com/forum/157371/swap-two-integers-variable-values-without-using-the-third-variable

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