some code of swift

learn.swift

var myVariable = 42
let myVariable = 42
let explicitDouble: Double = 70

let lable = "The width is "
let width = 94
let widthLable = label + String(width)

let apples = 3
let oranges = 5
let appleSummary = "I have \(apples) apples."
let fruitSummary = "I have \(apples + oranges) pieces of fruit."

var shoppingList = ["catfish", "water", "tulips", "blue paint"]
shppingList[1] = "bottle of water"
var occupations = [
  "Malcolm": "Captain",
  "Kaylee": "Mechanic",
]
occupations["Jayne"] = "Public Relations"

let emptyArray = String[]()
let emptyDictionary = Dictionary<String, Float>()