Problem

At Notion, you need a utility function that checks whether a given string reads the same forward and backward. Write a function that returns True if the input string is a palindrome and False otherwise.

Formal Specification

• Input: A string s
• Output: A boolean value
  • True if s is identical to its reverse
  • False otherwise

A palindrome comparison in this problem is case-sensitive and includes all characters, including spaces, punctuation, and digits.

Examples

Example 1

Input: s = "racecar"
Output: True

"racecar" reads the same from left to right and right to left.

Example 2

Input: s = "hello"
Output: False

The first and last characters do not match, so the string is not a palindrome.

Example 3

Input: s = "abba"
Output: True

The characters match symmetrically around the center.

Constraints

• 0 <= len(s) <= 10^5
• s may contain uppercase and lowercase letters, digits, spaces, and punctuation
• Use the exact characters in the string; do not normalize or remove characters