Swift Programming: The Big Nerd Ranch Guide

String Interpolation

Every town needs a name. Your town is fairly stable, so it will not be changing its name any time soon. Make the town name a constant of type String.

Listing 2.8  Giving the town a name

import Cocoa

let numberOfStoplights: Int = 4
var population: Int
population = 5422
let townName: String = "Knowhere"

It would be nice to have a short description of the town that the Tourism Council could use. The description is going to be a constant String, but you will be creating it a bit differently than the constants and variables you have created so far. The description will include all the data you have entered, and you are going to create it using a Swift feature called string interpolation.

String interpolation ...