input: Write a function to determine if a given string is a palindrome. If the string is a palindrome return True, else return False.
  
  def is_palindrome(s):
      '''This function returns True if the string s is a palindrome and False if it isn't.''' 
      return s == s[::-1]  # Checks if s is the same as its reverse.
output: def is_palindrome(s):
      return s == s[::-1]