1281. Subtract the Product and Sum of Digits of an Integer (easy)

Q:

Given an integer number n, return the difference between the product of its digits and the sum of its digits.

Example 1:

Input: n = 234
Output: 15 
Explanation: 
Product of digits = 2 * 3 * 4 = 24 
Sum of digits = 2 + 3 + 4 = 9 
Result = 24 - 9 = 15

Example 2:

Input: n = 4421
Output: 21
Explanation: 
Product of digits = 4 * 4 * 2 * 1 = 32 
Sum of digits = 4 + 4 + 2 + 1 = 11 
Result = 32 - 11 = 21

Constraints:

• 1 <= n <= 10^5

A:

class Solution {
public:
    int subtractProductAndSum(int n) {
        int pro=1, sum =0;
        while(n)
        {
            int v = n%10;
            n /= 10;
            pro *= v;
            sum += v;
        }
        return pro - sum;        
    }
};