1281. Subtract the Product and Sum of Digits of an Integer (C#).cs

public class Solution {
    public int SubtractProductAndSum(int n) {
        int rem = 0;        
        int sum_n = 0;     
        int product_n = 1;  

        // Loop until all digits of n are processed
        while(n > 0) {
            rem = n % 10;   // Get the last digit of n
            sum_n += rem;   // Add the digit to the sum
            product_n *= rem; // Multiply the digit to the product
            n /= 10;        // Remove the last digit from n
        }
        
        return product_n - sum_n;
        
    }
}