Factorial Calculator

Original Code Analysis:

The original code defines a recursive function called factorial that computes the factorial of a given input n. The function uses the base case n <= 1 to terminate the recursion and returns 1. For any other value of n, it recursively calls itself with n-1 and multiplies the result with n before returning the value.

Refactored Code:

The original code is already quite concise and efficient for calculating the factorial. There are no redundant or unnecessary code segments to remove. However, we can simplify the code by removing the else statement since it is not necessary.

def factorial(n):
    if n <= 1:
        return 1
    return n * factorial(n-1)

Minified Code:

To minify the code, we can shorten the function name from factorial to f. This change still conveys the purpose of the function.

def f(n):
    if n <= 1:
        return 1
    return n * f(n-1)

Commented Code:

def f(n):
    """
    Recursive function to calculate the factorial of a given number n.
    
    Parameters:
    n (int): The input number whose factorial needs to be computed.
    
    Returns:
    int: The factorial of the input number n.
    """
    if n <= 1:
        return 1
    return n * f(n-1)

Test Cases and Results:

Test Case 1:

• Input: n = 5
• Expected Output: 120
• Actual Output: 120

Test Case 2:

• Input: n = 0
• Expected Output: 1
• Actual Output: 1

Test Case 3:

• Input: n = 10
• Expected Output: 3628800
• Actual Output: 3628800

The refactored and minified code produces the expected results for the provided test cases.