Challenge 2-1: Functions

Suppose you wanted to make a peanut butter and jam sandwich. Which list of instructions looks easier?:

1: Get bread
2: Get knife
3: Open peanut butter
4: Put peanut butter on knife
5: Spread peanut butter on bread
6: And so on, and so on...

OR

1. Make a peanut butter and jelly sandwich

Functions are a way to group instructions.