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9. 回文数 #6

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webVueBlog opened this issue Aug 30, 2022 · 0 comments
Open

9. 回文数 #6

webVueBlog opened this issue Aug 30, 2022 · 0 comments

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@webVueBlog
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9. 回文数

Description

Difficulty: 简单

Related Topics: 数学

给你一个整数 x ,如果 x 是一个回文整数,返回 true ;否则,返回 false

回文数是指正序(从左向右)和倒序(从右向左)读都是一样的整数。

  • 例如,121 是回文,而 123 不是。

示例 1:

输入:x = 121
输出:true

示例 2:

输入:x = -121
输出:false
解释:从左向右读, 为 -121 。 从右向左读, 为 121- 。因此它不是一个回文数。

示例 3:

输入:x = 10
输出:false
解释:从右向左读, 为 01 。因此它不是一个回文数。

提示:

  • -231 <= x <= 231 - 1

**进阶:**你能不将整数转为字符串来解决这个问题吗?

Solution

Language: JavaScript

/**
 * @param {number} x
 * @return {boolean}
 */
var isPalindrome = function(x) {
    return +x.toString().split('').reverse().join('') === x;
};
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