[LeetCode][JavaScript]Palindrome Number

Palindrome Number

Determine whether an integer is a palindrome. Do this without extra space.

https://leetcode.com/problems/palindrome-number/

 

 

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判断一个数字是否为回文，OJ认为负数都不是回文。

倒转这个数字与原始的数字做比较。

 

/**
 * @param {number} x
 * @return {boolean}
 */
var isPalindrome = function(x) {
    if(x < 0) return false;
    var origin = x, reverse = 0;
    while(x > 0){
        reverse *= 10;
        reverse += x % 10;
        x = Math.floor(x / 10);
    }
    return origin === reverse;
};