input: from typing import List
  
  
  def is_palindrome(s: str) -> bool:
      """ This function returns True if the string s is a palindrome and False if it isn't.
      >>> is_palindrome('racecar')
      True
      >>> is_palindrome('hello')
      False
      """
      return s == s[::-1]  # Checks if s is the same as its reverse.
output:     return s == s[::-1]  # Checks if s is the same as its reverse.