Python Puzzlers Series - Create Function to Find Factorial

Welcome back everybody.

Today, our python puzzler challenge is to create a function that takes in a number and returns the factorial. We will also cover using the math package factorial.

A factorial is the product of an integer and all the integers below it.

5! = 5 x 4 x 3 x 2 x 1.

You might be familiar with factorials as they are used in the formulas to calculate combinations and permutations.

This puzzler level is easy.

In this series we will include: data structures, algorithms, brain teasers, puzzles, and coding challenges.

The purpose of these tutorials will be to:
* Help you improve your coding skills or knock off the rust.
* Help to improve your problem solving skills.
* Help you answer questions on sites like LeetCode, Codewars, HackerRank, etc.
* Help you prepare for interviews - if needed.
* And most importantly - have fun coding by solving brain teasers and puzzles.