Reverse A String In C#

One of the most common problems a programmer may come across is the need to reverse a string in C#. We won’t be using any inbuilt functions of C# for this purpose, rather we will be implementing this string reversal manually.

Code snippet for reversing a string in C#

using System;

class Program
{
    static void Main()
    {
        string str = "Hello, World!";
        char[] charArray = str.ToCharArray();
        Array.Reverse(charArray);
        Console.WriteLine(charArray);
    }
}

Code Explanation for reversing a string in C#

In the given code snippet, the basic idea is to convert the string into an array of characters, reverse that array, and then convert it back into a string.

• First, we use the using System; directive which allows us to use classes from the System namespace without typing out their full names.

• We declare the class called Program. The Main method is the entry point for the program.

• Inside the Main method, we declare a string str that contains the text “Hello, World!“.

• We then convert the str string into a character array using the ToCharArray() function from the string class in C#. This results in an array of individual characters from the string.

• After that, we use the Array.Reverse() function from the Array class in C#. This reverses the order of the characters in the array.

• Finally, we use the Console.WriteLine(charArray); statement to print out our reversed string to the console.

• When this code is executed, it reverses the string “Hello World!”, producing the output “!dlroW ,olleH”.

This is an easy, efficient and quick way to reverse a string in C# using built-in functions. You can apply this approach to any string you want to reverse, which makes it a useful utility in a wide variety of programming tasks.