Now, if you copy and paste the the files into a XCode Playground, you can call methods on your person object.
Playground.swift
12345
person.count// 1person.first?.zip// 12345
Enums
An enumeration defines a common type for a group of related values and enables you to work with those values in a type-safe way within your code. - Swift docs
Use an enum when you need a consistent data value.
A struct allows you to create a structured data type which provides storage of data using properties and extending its functionality via methods. -Tree House