Learn Swift 3.0 & Xcode 8 (Part 1 - Swift Basics)

LearnSwiftPartOne.playground

// Basic Operators
35 + 98
62 - 14
50 / 10
463 * 173


// Types
var age: Int = 21 // Int = Integer = Any whole number
var milesCanRun: Double = 0.75 // Double = Float = Decimal Number
var name: String = "Dylan" // String = Any Text = Quotation Marks
var awesome: Bool = true // Bool = Boolean = true / false


// Inferred Types
var dogsAge = 21
var dogsName = "Pluto"
var dogIsAwesome = true
var dogCanRunMiles = 10.5


// Variable Manipulation
dogsAge = 22


// Variable and Constant
let myFavouriteFood = "Chocolate"
// myFavouriteFood = "Apples" // Error


// Comparison Operators (<, >, ==, <=,...)
let myCurrentAge = 21
let myMumsAge = 45
let myFriendsAge = 23
let yearsOnEarth = 21


myCurrentAge > myMumsAge
myCurrentAge == yearsOnEarth
myCurrentAge < myMumsAge && myCurrentAge > myFriendsAge
myCurrentAge < myMumsAge || myCurrentAge > myFriendsAge
myCurrentAge >= yearsOnEarth


// If/Else Statements
if myCurrentAge < myMumsAge {
    // I am older than my mum
    print("I am younger than my mum")
} else {
    // My mum is older than me
    print("My mum is older than me")
}


// Basic Functions
func sayHello() {
    print("Hello")
}
sayHello()


// Slightly more advanced function
let myName = "Dylan"
func sayHelloToMe(name: String) {
    let helloString = "Hello \(name)"  
    print(helloString)    
}
sayHelloToMe(name: myName)


// String Interpolation
let myNewName = "Steve"
let myNewAge = 60
let myAgeString = "\(myNewName) is \(myNewAge) years old"

thank you very helpful 👍