Comments on: Three Ways to Reverse a String in C#

By: Susanta

Susanta — Wed, 26 Sep 2012 08:36:54 +0000

static void Main(string[] args)
{
Console.WriteLine(“Enter a string :”);
string Name = Console.ReadLine();
char[] character = Name.ToCharArray();
Console.WriteLine(“Entered String is: ” + Name);
Array.Reverse(character);
Console.WriteLine(“After reverse string is :”);
Console.WriteLine(character);
Console.ReadKey();
}

By: nepaliguy

nepaliguy — Fri, 20 May 2011 11:41:17 +0000

this works perfectly..kerry example gives index out of range error..may be its his typo
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication5
{
class Program
{
public static string ReverseString1(String str, int len)
{
if (len == 1)
return str;
else
return ReverseString1(str.Substring(1, str.Length – 1), len-1)+str[0].ToString();

}
static void Main(string[] args)
{
string test = “This is a test”;
int length = test.Length;
string result=ReverseString1(test, length);
Console.WriteLine(result);
Console.ReadLine();
}
}
}

By: Coding test: write a function to reverse a string. « spokeent

Coding test: write a function to reverse a string. « spokeent — Wed, 13 Apr 2011 00:52:08 +0000

[...] + reverse(left); } else{ return str; } } } http://www.dotnetperls.com/reverse-string http://www.kerrywong.com/2006/03/04/three-ways-to-reverse-a-string-in-c/ GA_googleAddAttr("AdOpt", "1"); GA_googleAddAttr("Origin", "other"); [...]

By: sampath

sampath — Tue, 15 Dec 2009 13:37:56 +0000

protected void btnsubmit_Click(object sender, EventArgs e)
{

string str_in = txtinput.Text.Trim();
string output = “”;
for (int i = str_in.Length-1; i >= 0; i–)
{
output = output + str_in.Substring(i,1);
}
txtoutput.Text = output;
//another way
char[] cstr = str_in.ToCharArray();
Array.Reverse(cstr);
txtoutput.Text = reversestring(cstr);

}
public string reversestring(char[] newq)
{
return new string(newq);
}

By: Dmitry Starchuk

Dmitry Starchuk — Tue, 24 Nov 2009 01:27:32 +0000

Here is another version, it has many variations

/************************************************/
public string Reverse(string s, int l)
{
if (l == 1)
return s;
else
return s[l-1].ToString()+ Reverse(0,l-1), l – 1) +
}
/************************************************/

By: r deken

r deken — Tue, 08 Sep 2009 21:27:42 +0000

following code also works for the recursive method:

/************************************************/
public string Reverse(string s, int l)
{
if (l == 1)
return s;
else
return Reverse(s.Substring(l – (s.Length – 1), s.Length – 1), l – 1) + s[0].ToString();
}
/************************************************/
usage is the same as above

By: chong yeow

chong yeow — Fri, 12 Jun 2009 07:19:39 +0000

private string recursive(string s, int i)
{
if (i == 0)
{
return s.Substring(s.Length/2,s.Length/2);
}
else
{
return recursive(s + s.Substring(i-1,1), i-1);
}
}

By: Pavan kumar

Pavan kumar — Tue, 19 May 2009 10:52:24 +0000

Hi Kerry D,

I tried all the methods but third one is not working. But it looks good. could you please recode it.

Pavan

By: 24234234

24234234 — Sun, 22 Feb 2009 17:04:11 +0000

char[] arr = s.ToCharArray();
Array.Reverse(arr);
return new string(arr);

By: lav

lav — Mon, 08 Sep 2008 05:28:41 +0000

this code for recursion works
using system;
{
class reversedemo
{
string output=string.empty;
public void reverse(string s)
{
if(input.length>0)
{
output+=s.substring(s.length-1);
s=s.substring(0,s.length-1);
reverse(s);
}
}
console.writeline(output);
public static void main()
{
reversedemo rd=new reversedemo();
rd.reverse(“abcd”);
}
}

By: drifter5781

drifter5781 — Thu, 04 Sep 2008 21:00:58 +0000

Hi Kerry,
I’ve tried your 3rd approach of reversing a string. It doesn’t seem correct when I copy/paste your provided code snippet.

Thanks in advance

By: Sachin

Sachin — Sun, 24 Feb 2008 11:12:49 +0000

Hello. I need to reverse a string using stack. I read this and truely i cant understand because i m a beginner .. I know push and pop codes. Will you please elaborate reverse function.