TESTDOME - PALINDROME

TEST C#:

Write a function 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.

SOLUTION (100%):

public class Palindrome

{

    public static bool IsPalindrome(string str)

    {        

        str = str.ToLower();

        var newStr = String.Join("", str.Where(char.IsLetterOrDigit));

        int l = newStr.Length;

        var reverse = String.Empty;       

        

        for (int i= l-1; i>=0; i--) reverse +=newStr[i];

        

        if (newStr == reverse) return true;

        else return false;            

            

    }

    public static void Main(string[] args)

    {      

        Console.WriteLine(IsPalindrome("Noel sees Leon."));

    }

}

PR