Introducing structures

Imagine you live in a town called Pizzaville. As you might expect, Pizzaville is known for it’s amazing pizza. Imagine that you own the most popular (and fastest!) pizza delivery restaurant in Pizzaville — “Swift Pizza”.

As you begin to expand, you want to write a program that calculates if a potential customer is within range of a pizza delivery restaurant. The first version of your program might might look something like this:

Simple enough, right?

A successful pizza delivery business may eventually expand to include multiple locations, which adds a minor twist to the deliverable calculator. Replace your existing code with the following:

secondDeliveryDistance < otherRestaurantRange

}

Eventually, the rising number of customers will force the business to expand, and soon it might grow to a total of 10 stores! Then what? Do you keep updating your function to check against all these sets of coordinates and ranges?

You might briefly consider creating an array of x/y coordinate tuples to keep track of your pizza restaurants, but that would be both difficult to read and maintain.

Fortunately, Swift has additional tools to help you simplify the problem.