C++

1class Solution {
2  public:
3    int subtractProductAndSum(int n) {
4      int p = 1;
5      int s = 0;
6
7      while(n>0) 
8      {
9        int t = n%10;
10        n = n/10;
11
12        p *= t;
13        s += t;
14      }
15
16      return p - s;
17    }
18};

Ruby

1def subtract_product_and_sum(n)
2  p = 1
3  s = 0
4
5  while n > 0 do
6    t = n % 10
7    n /= 10
8
9    p *= t
10    s += t
11  end
12
13  p - s
14end

JavaScript

1var subtractProductAndSum = function(n) {
2  let p = 1;
3  let s = 0;
4
5  while (n>0) {
6    let t = n%10;
7    n = Math.floor(n / 10);
8
9    p *= t;
10    s += t;
11  }
12
13  return p - s;
14};
15