Constants and Variables

import UIKit
let encrouragement = "You can do it!"

var personalizedEncouragement = "You can do it, Lauren!"
personalizedEncouragement = personalizedEncouragement.stringByReplacingOccurrencesOfString("Lauren", withString:"Cameron")

let birthYear = 2008
var currentYear == 2017
var age = currentYear - birthYear

let buildingCapacity = 300
var attendance = 220
attendance += 2

var goat = UIImage(named:"Chinese-New-Year-3.jpg")!
let yearsOfTheGoat = [1967, 1979, 1991, 2003, 2015]
let yearsOfTheSheep = [1967, 1979, 1991, 2003, 2015]
yearsOfGoat.append(2027)