Given an integer `x`, return `true` if `x` is a palindrome, and `false` otherwise.
An integer is a **palindrome** when it reads the same forward and backward. For example, `121` is a palindrome while `123` is not.
Examples & Test Cases
Example 1:
Input: 121
Output: true
Explanation: 121 reads as 121 from left to right and from right to left.
Example 2:
Input: -121
Output: false
Explanation: From left to right, it reads -121. From right to left, it becomes 121-. Therefore it is not a palindrome.
Example 3:
Input: 10
Output: false
Explanation: Reads 01 from right to left. Therefore it is not a palindrome.
