Reverse Number Program in C# with Examples

In this article, I am going to discuss the Reverse Number Program in C# with some examples. Please read our previous article where we discussed the Palindrome Program in C# with some examples. This is one of the most frequently asked interview questions in C#. As part of this article, we are going to discuss the following pointers.

1. How to reverse a given number in C#?
2. How to reverse a string in C#?

How to reverse a given number in C#?
In the following program, we take the input number from the console and then reverse that number.

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using System; namespace LogicalPrograms {     public class Program     {         static void Main(string[] args)         {             Console.Write("Enter a Number : ");             int number = int.Parse(Console.ReadLine());             int reminder, reverse = 0;             while (number > 0)             {                 //Get the remainder by dividing the number with 10                  reminder = number % 10;                 //multiply the sum with 10 and then add the reminder                 reverse = (reverse * 10) + reminder;                 //Get the quotient by dividing the number with 10                 number = number / 10;             }             Console.WriteLine($"The Reverse order is : {reverse}");             Console.ReadKey();         }     } }

Output:

How to reverse a string in C#?
In the following program, we take the string as an input from the console. Then we reverse the string using for loop.

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using System; namespace LogicalPrograms {     public class Program     {         static void Main(string[] args)         {             Console.Write("Enter a String : ");             string name = Console.ReadLine();             string reverse = string.Empty;             for (int i = name.Length - 1; i >= 0; i--)             {                 reverse += name[i];             }             Console.WriteLine($"The Reverse string is : {reverse}");             Console.ReadKey();         }     } }

Output:

Reverse a string Using Foreach loop in C#:
Let us see how to reverse a string using for each loop in C#.

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using System; namespace LogicalPrograms {     public class Program     {         static void Main(string[] args)         {             Console.Write("Enter a String : ");             string name = Console.ReadLine();             string reverse = string.Empty;             foreach (char c in name)             {                 reverse = c + reverse;             }                           Console.WriteLine($"The Reverse string is : {reverse}");             Console.ReadKey();         }     } }

Output:

Reverse a string using Array.Reverse Method in C#:
In the following example, we take a string as an input from the console and then convert that string to a character array. Then we use the Array class Reverse method to reverse the elements of the character array. Once we reverse the elements of the character array, then we create a string from that character array.

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using System; namespace LogicalPrograms {     public class Program     {         static void Main(string[] args)         {             Console.Write("Enter a String : ");             string name = Console.ReadLine();             char[] nameArray = name.ToCharArray();             Array.Reverse(nameArray);             string reverse = new string(nameArray);                           Console.WriteLine($"The Reverse string is : {reverse}");             Console.ReadKey();         }     } }

Output:

In the next article, I am going to discuss the Armstrong Number Program in C# with some examples. Here, in this article, I try to explain the different ways to reverse a number and a string using C# with some examples. I hope you understand the Reverse Number Program in C# with examples.

Summary:
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