Our first class

Go ahead and create a new Xcode playground and delete the autogenerated content. Let's continue with our example of modeling a person by adding the following to our playground:

class Person {
 
}

Note

All related source code for this chapter can be found here: https://github.com/swift-book-projects/swift-3-programming-for-kids/tree/master/Chapter-9

Let's take a look at the simple code we just wrote. The class keyword is how we define a class in Swift. Remember that a class is our abstract representation of something we are trying to model and the object is the instance of our class. Next, Person is the name of our class, and is also called our type. In Swift, we capitalize the names of our classes. This is similar to other types we have seen so far, such as String and Int; the difference being that this is a type that we define ourselves.

If we want to instantiate our new class that does not hold any functionality, we will do...