Math related question

1281-Subtract-the-Product-and-Sum-of-Digits-of-an-integer.py

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+'''
+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
+'''
+class Solution:
+    def subtractProductAndSum(self, n: int) -> int:
+        digit, s, p = 0, 0, 1
+        while n > 0:
+            digit = n%10
+            n = n//10
+            p = p * digit
+            s = s + digit
+        return p - s