342.4-的幂.js

/*
 * @lc app=leetcode.cn id=342 lang=javascript
 *
 * [342] 4的幂
 */

// @lc code=start
/**
 * @param {number} n
 * @return {boolean}
 */
var isPowerOfFour = function (num) {
  return /^1(00)*$/.test(num.toString(2));
};
// @lc code=end