1342-number-of-steps-to-reduce-a-number-to-zero.js

/**
 * 1342. Number of Steps to Reduce a Number to Zero
 * https://leetcode.com/problems/number-of-steps-to-reduce-a-number-to-zero/
 * Difficulty: Easy
 *
 * Given an integer num, return the number of steps to reduce it to zero.
 *
 * In one step, if the current number is even, you have to divide it by 2,
 * otherwise, you have to subtract 1 from it.
 */

/**
 * @param {number} num
 * @return {number}
 */
var numberOfSteps = function(num) {
  let steps = 0;
  while (num > 0 && ++steps) {
    num = num % 2 === 0 ? num / 2 : num -1;
  }
  return steps;
};