A Swift Tour

Question 1

Write Hello, World!

Answer 1

print(“Hello, World!”)

Question 2

Write the variable named myVariable and make it = to 42

Answer 2

var myVariable = 42

Question 3

Write a constant variable named myConstant and make it = to 50

Answer 3

let myConstant = 50

Question 4

Write an implicit constant integer named implicitInteger and make it = 70

Answer 4

let implicitInteger = 70

Question 5

Write an implicit constant double named implicitDouble and make it = 70.0

Answer 5

Let implicitDouble = 70.0

Question 6

Write an explicit constant double named explicitDouble and make it = 70

Answer 6

Let explicitDouble:Double = 70

Question 7

Write and explicit float constant named myFloat = 4.0

Answer 7

Let myFloat: Float = 4.0

Question 8

let label = “The width is “
let width = 94
Write an implicit constant string named widthLabel = “The width is 94” using the constants label and width

Answer 8

let widthLable = label + String(width)

Question 9

let apples = 3
let oranges = 5
Write and implicit string constant named appleSummary and use the parentheses to show “I have 3 apples” using the variable apples

Answer 9

let appleSummary = “I have (apples) apples”

Question 10

Create a variable array called shoppingList = “catfish”, “water”, “tulips”, “blue paint”

Answer 10

var shoppingList = [“catfish”, “water”, “tulips”, “blue paint”]

Question 11

make the second item of a declared variable array called shoppingList = “bottle of water”

Answer 11

shoppingList[1] = “bottle of water”

Question 12

var occupations = [“Malcolm”: “Captain”,”Kaylee”: “Mechanic”,]

Add a new pair value to the occupations dictionary: Jaine = Public Relations

Answer 12

occupations[“Jaine”] = “Public Relations”

Question 13

Create an empty array called emptyArray using the initializer syntax

Answer 13

let emptyArray = String

Question 14

Create an empty dictionary named emptyDictionary using the initializer syntax

Answer 14

let emptyDictionary = String: Float

Question 15

If type information can be inferred, write an empty array named shoppingList

Answer 15

var shoppingList = []

Question 16

If type information can be inferred, write an empty dictionary named ocupations

Answer 16

var occupations = [:]