palindromeNumber.js

//////////////////////////////////////////////Palindrome Number///////////////////////////////////////////////////////
// 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:
// -231 <= x <= 231 - 1
const isPalindrome = function(x) {
    let newX = x.toString().split('').reverse().join('');
    newX = parseInt(newX);
    return x === newX ? true : false;
};

// console.log(isPalindrome(121));
// console.log(isPalindrome(-121));
// console.log(isPalindrome(10));
// console.log(isPalindrome(-101));