Factorial Calculation in Python

Introduction

In this project, you will learn how to calculate the factorial of a non-negative integer. The factorial of a positive integer is the product of all positive integers less than or equal to it, and the factorial of 0 is 1.

👀 Preview

$ python factorial.py
2! = 1 * 2 = 2
8! = 1 * 2 * 3 * 4 * 5 * 6 * 7 * 8 = 40320

🎯 Tasks

In this project, you will learn:

• How to create a factorial.py file in the ~/project directory
• How to implement the factorial function to calculate the factorial of a non-negative integer
• How to handle negative inputs by raising a ValueError and display a prompt saying "Please enter a non-negative integer"

🏆 Achievements

After completing this project, you will be able to:

• Understand the concept of factorial and how to calculate it
• Write a Python function to calculate the factorial of a non-negative integer
• Handle input errors and display appropriate error messages
• Apply your knowledge of Python programming to solve a real-world problem