Recursive Factorial

Welcome to the Factorial Calculation Lab! In this lab, you will implement a function named factorial() in Python. Your task is to calculate the factorial of a given positive integer using a recursive approach.

The factorial of a number n (denoted as n!) is the product of all positive integers from 1 to n. For example, 4! = 4 x 3 x 2 x 1 = 24.

Function Requirements:

• The function should be named factorial.
• It must use recursion to calculate the factorial.
• The function should take a single integer argument and return the factorial of that number.

Examples:

1. Input: 5
   Expected Output: 120
   Explanation: 5! = 5 x 4 x 3 x 2 x 1 = 120

2. Input: 3
   Expected Output: 6
   Explanation: 3! = 3 x 2 x 1 = 6

Remember to test your function with various inputs, including the numbers provided in the challenges. Good luck!