Structs: Your Own Types

Making your own types

Int, String, Double — those are Swift's built-ins. But PawWalk thinks in walkers, pets, and bookings. A struct lets you define a type of your own: a named bundle of values.

Each let name: String line inside a struct is a stored property — a piece of data that every value of the type carries. You read one with a dot: walker.name.

You've already met the most important struct in the app. Here it is for real: