191.位-1-的个数.js

/*
 * @lc app=leetcode.cn id=191 lang=javascript
 *
 * [191] 位1的个数
 */

// @lc code=start
/**
 * @param {number} n - a positive integer
 * @return {number}
 */
var hammingWeight = function (n) {
  let count = 0;
  /*   while (n !== 0) {
    n = n & (n - 1);
    count++
  } */
  while (n > 0) {
    n = (n & (n - 1)) >>> 0;
    count++;
  }
  return count;
};
// @lc code=end