Calculating Factorial Using Recursion

This project demonstrates how to calculate the factorial of a number using a recursive function in Python.

Steps to Calculate Factorial:

1. Take Input from User: Prompt the user to enter a number and convert the input to an integer.
2. Define the Factorial Function: The factorial of a number ( n ) is calculated as ( n \times (n-1)! ).
3. Base Case for Recursion: The recursion will stop when ( n = 0 ) and return ( 0! = 1 ).
4. Print the Output: Display the factorial of the entered number.

Example Code:

# factorial.py

def factorial(n):
    if n == 0:
        return 1
    else:
        return n * factorial(n-1)

if __name__ == "__main__":
    number = int(input("Enter a number: "))
    print(f"The factorial of {number} is {factorial(number)}")