The Xcode playground for this chapter is in the Chapter03 folder of the code bundle for this book, which can be downloaded here:
https://github.com/PacktPublishing/iOS-13-Programming-for-Beginners.
If you wish to start from scratch, create a new playground and name it ConditionalsAndOptionals.
You can type in and run all the code in this chapter as you go along. You'll start by learning about conditionals.
Check out the following video to see the code in action: