Technical requirements
The Xcode playground for this chapter is in the Chapter06 folder of the code bundle for this book, which can be downloaded here:
Check out the following video to see the code in action:
https://bit.ly/3TyovDS
If you wish to start from scratch, create a new playground and name it FunctionsAndClosures.
You can type in and run all of the code in this chapter as you go along. Let’s start by learning about functions.