#2520 - Count the Digits That Divide a Number

Easy • View on LeetCode • View on GitHub

Problem Description

Given an integer num, return the number of digits in num that divide num.

An integer val divides nums if nums % val == 0.

Solution

/**
 * @param {number} num
 * @return {number}
 */
var countDigits = function(num) {
  let result = 0;
  let n = num;

  while (n > 0) {
    if (num % (n % 10) === 0) result++;
    n = Math.floor(n / 10);
  }

  return result;
};