Write a Python function to check if a given string is a palindrome or not. A palindrome is a word, phrase, number, or other sequence of characters that reads the same forward and backward. The function should return True if the string is a palindrome and False otherwise.

For example, the string "racecar" is a palindrome, while the string "hello" is not.

Here's an example function signature to get started:

pythonCopy codedef is_palindrome(s: str) -> bool: # your code here

Feel free to use any approach you like to solve the problem