Number of Steps to Reduce a Number to Zero.java

class Solution {
    public int numberOfSteps(int num) {
        return helper(num,0);
    }
    public int helper(int n,int c){
        if(n==0) return c;
        if(n%2==0){              //check for even no.
            return helper(n/2,c+1);
        }
        
        return helper(n-1,c+1);
    }
}