How To Reverse String Using StringBuilder

In this blog, I am going to explain the program for string reverse using StringBuilder.

Introduction

 

In this blog, I am going to explain the program for string reverse using StringBuilder.

 

Software Requirements:

• C# 3.0 or higher,
• Visual Studio or Notepad

Program

using System;
using System.Text;

namespace StringReverseUsingStringBuilder {
 public static class StringReverse {
  // Reverse ExtentionMethod
  public static string Reverse(this string str) {
   // calling StringReverseUsingStringBuilder
   return Program.StringReverseUsingStringBuilder(str);
  }
 }
 class Program {
  static void Main() {
   Console.WriteLine("(Input is Optional and Default value will be CSharpcorner)");
   Console.WriteLine("Enter your data to Reverse otherwise just Hit Enter");
   string sampleText = Console.ReadLine();
   if (string.IsNullOrEmpty(sampleText))
    sampleText = "https://www.c-sharpcorner.com";
   Console.WriteLine("=======================================================");
   Console.WriteLine($ "Original Text : {sampleText}");
   Console.WriteLine("=======================================================");
   var reverseText = StringReverseUsingStringBuilder(sampleText);
   Console.WriteLine($ "Reversed Text (Using Normal Method) : {reverseText}");
   Console.WriteLine("======================================================");
   reverseText = sampleText.Reverse();
   Console.WriteLine($ "Reversed Text (Using Extension Method) : {reverseText}");
  }
  public static string StringReverseUsingStringBuilder(string str) {
   StringBuilder sb = new StringBuilder(str);
   for (int i = 0; i < sb.Length / 2; i++) {
    var temp = sb[sb.Length - i - 1];
    sb[sb.Length - i - 1] = sb[i];
    sb[i] = temp;
   }
   return sb.ToString();
  }
 }
}

If the user does not enter anything, then the default value will be "https://www.c-sharpcorner.com"

 

 

 

An example with input would be if the user enters "c-sharpcorner

 

 

 

In my next blog, we will discuss generating Random numbers without using Random Class. Thank you so much for reading my blog post.