1342. Number of Steps to Reduce a Number to Zero

leetcode1342.swift

class Solution {
    func numberOfSteps (_ num: Int) -> Int {
        
        var num = num
        var counter = 0
        while num > 0 {
            if num % 2 == 0 {
                num = num/2
                counter += 1
            } else {
                num = num - 1
                counter += 1
            }
        }
        
        return counter
    }
}