Check if a given string is Palindrome

Checking for a palindrome string is similar to how we check for a palindrome number, except that we go with full-length character operations instead of modulo divisions.

        public static bool IsPalindromeString(string input)
        {
            var reverse = new char[input.Length];

            for (int j = 0, i = input.Length - 1; i >= 0; j++, i--)
            {
                reverse[j] = input[i];
            }

            for (int i = 0; i < input.Length; i++)
            {
                if (input[i] != reverse[i])
                {
                    return false;
                }
            }

            return true;
        }
        

How it works:

We begin by copying the input string in reverse into another character array, and then examine both the strings character by character for any inequality. If none found, then its a palindrome else its not.

Output:

Enter input: abcdcba
abcdcba is Palindrome? : True

Enter input: abcabc
abcabc is Palindrome? : False