Return the factorial of the provided integer.

If the integer is represented with the letter n, a factorial is the product of all positive integers less than or equal to n.

Factorials are often represented with the shorthand notation `n!`

For example: `5! = 1 * 2 * 3 * 4 * 5 = 120`

Remember to use Read-Search-Ask if you get stuck. Write your own code.

Here are some helpful links:

Sign in so you can save your progress