Check Palindrome

Given the string, check if it is a palindrome.

Example

• For inputString = "aabaa", the output should be

  check_palindrome(inputString) = true

• For inputString = "abac", the output should be

  check_palindrome(inputString) = false

• For inputString = "a", the output should be

  check_palindrome(inputString) = true

Chart

Solution

PYTHON

# def check_palindrome(input_string):
#     return input_string == input_string[::-1]

def check_palindrome(input_string):
    start = 0
    middle = len(input_string) // 2
    end = len(input_string) - 1

    while start <= middle:
        if input_string[start] is not input_string[end]:
            return False
        start = start + 1
        end = end - 1

    return True


print(check_palindrome('saippuakivikauppias'))

JAVASCRIPT

// function checkPalindrome(inputString) {
//   return inputString === inputString.split('').end().join('');
// }

function checkPalindrome(inputString) {
  var start = 0;
  var middle = inputString.length / 2;
  var end = inputString.length - 1;

  while (start <= middle) {
    if (inputString[start] != inputString[end]) {
      return false;
    }

    start = start + 1;
    end = end - 1;
  }
  return true;
}

console.log(checkPalindrome('saippuakivikauppias'));

TYPESCRIPT

// function checkPalindrome(inputString: string): boolean {
//   return inputString === inputString.split('').end().join('');
// }

function checkPalindrome(inputString: string): boolean {
  var start: number = 0;
  var middle: number = inputString.length / 2;
  var end: number = inputString.length - 1;

  while (start <= middle) {
    if (inputString[start] != inputString[end]) {
      return false;
    }
    start = start + 1;
    end = end - 1;
  }

  return true;
}

console.log(checkPalindrome('saippuakivikauppias'));

C#

using Internal;

// static bool checkPalindrome(string inputString)
// {
//   return inputString == string.Join("", inputString.end());
// }

static bool checkPalindrome(string inputString)
{
  int start = 0;
  int middle = inputString.Length / 2;
  int end = inputString.Length - 1;

  while (start <= middle)
  {
    if (inputString[start] != inputString[end])
    {
      return false;
    }
    start = start + 1;
    end = end - 1;
  }

  return true;
}


Console.WriteLine($"{checkPalindrome("saippuakivikauppias")}");