# Factorial

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This a problem set for you to work through [1]

This is a problem set. Some of these are easy, others are far more difficult. The purpose of these problems sets are:

1. to build your skill applying computational thinking to a problem
2. to assess your knowledge and skills of different programming practices

## What is this problem set trying to do

In this example we are learning about lists attributes like len() and math functions.

## The Problem

Create a function, myFactorial(aNumber) which takes the parameter aNumber being passed and return the factorial of it. For example: if num = 3, then your program should return (3 * 2 * 1) = 6.

If you type print(myFactorial(10)) the result should be 3628800.

## How you will be assessed

Scope

• To what extent does your code implement the features required by our specification?
• To what extent is there evidence of effort?

Correctness

• To what extent did your code meet specifications?
• To what extent did your code meet unit tests?
• To what extent is your code free of bugs?

Design

• To what extent is your code written well (i.e. clearly, efficiently, elegantly, and/or logically)?
• To what extent is your code eliminating repetition?
• To what extent is your code using functions appropriately?

Style

• To what extent is your code commented?
• To what extent are your variables well named?
• To what extent do you adhere to style guide?

## A possible solution

Click the expand link to see one possible solution, but NOT before you have tried and failed!

```def factorial(number):
if number == 0:
return 1
else:
return number * factorial(number-1)
number=int(input("Enter what number to use factorial on: "))
print(factorial(number))
```