1281. Subtract the Product and Sum of Digits of an Integer

题目

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:

给你一个整数 n，请你帮忙计算并返回该整数「各位数字之积」与「各位数字之和」的差。

提示：

func subtractProductAndSum(n int) int {
	sum, product := 0, 1
	for ; n > 0; n /= 10 {
		sum += n % 10
		product *= n % 10
	}
	return product - sum
}