9\. Palindrome Number

Easy

Given an integer `x`, return `true` if `x` is palindrome integer.

An integer is a **palindrome** when it reads the same backward as forward. For example, `121` is palindrome while `123` is not.

**Example 1:**

**Input:** x = 121

**Output:** true 

**Example 2:**

**Input:** x = -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:** x = 10

**Output:** false

**Explanation:** Reads 01 from right to left. Therefore it is not a palindrome. 

**Example 4:**

**Input:** x = -101

**Output:** false 

**Constraints:**

*   <code>-2<sup>31</sup> <= x <= 2<sup>31</sup> - 1</code>

**Follow up:** Could you solve it without converting the integer to a string?