Write a function in C# that checks if a given sentence is a palindrome.

Question

1.00/5 (1 vote)

See more:

Write a function in C# that checks if a given sentence is a palindrome. A palindrome is a word, phrase, verse, or sentence that reads the same backward or forward. Only the order of English alphabet letters (A-Z and a-z) should be considered, other characters should be ignored.

For example, IsPalindrome("Noel sees Leon.") should return true as spaces, period, and case should be ignored resulting with "noelseesleon" which is a palindrome since it reads same backward and forward.

What I have tried:

C#

using System;

public class Palindrome
{
public static bool IsPalindrome(string str)
{
string rev = "";
//string [] words
  
for(int i = input1.Length-1; i >= 0; i--)
       {
   rev += input1[i];
}
  
if(str.ToLower() == rev.ToLower())
{
return true;
  
}else{
return false;
}
}

public static void Main(string[] args)
{
Console.WriteLine(IsPalindrome("Noel sees Leon."));
}
}

Posted 22-Mar-16 21:42pm

vjanand8

Updated 11-Jun-16 17:19pm

dan!sh

v2

Add a Solution

Comments

Garth J Lancaster 23-Mar-16 3:53am

so what is your question / issue ?

FARONO 23-Mar-16 4:37am

In this code you don't ignore spaces and other characters..? The period at the end of you call ("Noel sees Leon.") ruïns the palingdrome

[edit]sorry, Solution 2 fixed it

BillWoodruff 23-Mar-16 6:10am

Why have you not tried removing the white space and punctuation in your example code ?

Philippe Mori 23-Mar-16 12:38pm

You should do your homework by yourself. Otherwise, you will never become a good programmer...

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Maciej Los · Answer 1 · 2016-03-22T22:01:00

Solution 1

Tons of answers/solutions/tips/articles you'll find here: Search - CodeProject[^]

Posted 22-Mar-16 22:01pm

Maciej Los

Updated 22-Mar-16 22:02pm

v2

Comments

BillWoodruff 23-Mar-16 6:11am

Is this really a "solution" ?

Maciej Los 23-Mar-16 6:17am

Hi Bill,
Yes, this is the best solution. Question about palindrome has been quite often asked. OP needs to improve already existing solutions to own logic.

Karthik_Mahalingam · Answer 2 · 2016-03-22T22:02:00

Try this

C#

class Program
  {
      static void Main(string[] args)
      {
          Console.WriteLine(IsPalindrome("Noel sees Leon."));
          Console.ReadLine();
      }

      public static bool IsPalindrome(string str)
      {
          string forward = "";
          foreach (char c in str.ToLower())  // ToLower to ignore the case
              if (char.IsLetter(c))  // ignore the period, space and other char except alphabets
                  forward += c;

          char[] temp = forward.ToCharArray();
          Array.Reverse(temp);
          string reverese = new string(temp);
          return forward == reverese;
      }
  }