LeetCode-Go/leetcode/1281.Subtract-the-Product-and-Sum-of-Digits-of-an-Integer

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:

• 1 <= n <= 10^5

题目大意

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：

• 1 <= n <= 10^5

解题思路

• 给出一个数，计算这个数每位数字乘积减去每位数字累加的差值。
• 简单题，按照题意输入输出即可。

代码

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