LASA_AP_WhileLoop_Set01_Problem04

Problem 4a: Product of Digits
Problem: Given a positive integer n, return the product of its digits. If n is 0, return 1.
Solution Approach: Use a while loop to extract each digit of n by taking the remainder when dividing by 10, then multiply the digit to a cumulative product. Continue dividing n by 10 to remove the last digit until n becomes 0.