Problem

At Grammarly, 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 when reversed
  • False otherwise

A palindrome comparison in this problem is case-sensitive and includes all characters exactly as they appear.

Examples

Example 1

Input: s = "racecar"
Output: True

Explanation: The string is the same from left to right and right to left.

Example 2

Input: s = "hello"
Output: False

Explanation: Reversing the string gives "olleh", which is different from "hello".

Example 3

Input: s = "abba"
Output: True

Explanation: Matching characters appear symmetrically from both ends.

Constraints

• 0 <= len(s) <= 10^5
• s may contain letters, digits, spaces, or symbols
• Use exact character matching with no normalization