# How to find the reverse of a number using C# ?

Published on May 14, 2014 by Senthil Kumar

Filed under C#

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Below is a sample code snippet that demonstrates how to find the reverse of a number using C# .

# How to find the reverse of a number using C# ?

```using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace AbundantcodeConsoleApp
{
internal class Program
{
private static void Main(string[] args)
{
// How to find the reverse of a number using C# ?
int Input = 2985;
int ReverseNumber = 0;
while (Input > 0)
{
int rem = Input % 10;
ReverseNumber = (ReverseNumber * 10) + rem;
Input = Input / 10;

}
Console.WriteLine("Output : {0}", ReverseNumber);
}
}

}
```

1. Or you could be a linq-fanatic and implement in a one-liner:

private static void Main(string[] args)
{
Func LinqReverse = x => x.ToString().Reverse().Aggregate(0, (a, c) => a * 10 + (c – ‘0’));
Console.WriteLine(LinqReverse(123456));
}

May 24, 2014 - 5:55 am – Reply

• Actually: Func LinqReverse = x => x.ToString().Reverse().Aggregate(0, (a, c) => c – ‘0’ + 10 * a);

March 15, 2015 - 12:23 am – Reply

2. Or this:

Func LinqReverse = x => Convert.ToInt32(string.Join(string.Empty, x.ToString().Reverse()));

March 15, 2015 - 12:12 am – Reply

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