C#: Get the reverse of a string

Last update on December 20 2024 12:43:10 (UTC/GMT +8 hours)

Write a program in C# Sharp to get the reverse of a string using recursion.

Visual Presentation:

Sample Solution:

C# Sharp Code:

using System;

class RecExercise14
{
    static void Main()
    {
        string str;
        // Prompt the user to enter a string
        Console.WriteLine("\n\n Recursion : Get the reverse of a string :");
        Console.WriteLine("----------------------------------------------");
        Console.Write(" Input the string : ");
        str = Console.ReadLine();

        // Call the StringReverse function to reverse the input string
        str = StringReverse(str);

        // Display the reversed string
        Console.Write(" The reverse of the string is : ");
        Console.Write(str);
        Console.ReadKey(); // Wait for a key press
        Console.Write("\n");
    }

    // Recursive function to reverse a string
    public static string StringReverse(string str)
    {
        // Check if the string has characters
        if (str.Length > 0)
            // Reverse the string by taking the last character and calling StringReverse on the substring
            return str[str.Length - 1] + StringReverse(str.Substring(0, str.Length - 1));
        else
            return str; // Return the string if it's empty
    }
}

Sample Output:

 Recursion : Get the reverse of a string :                                                                    
----------------------------------------------                                                                
 Input the string : W3resource                                                                                
 The reverse of the string is : ecruoser3W  

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