Solutions.swift

let testNum: Double = 3.0

let numAsInt = Int(testNum)

let numConvertedBackToDouble = Double(numAsInt)

numConvertedBackToDouble == testNum


var myPoint: (Double, Double)
myPoint = (4,2)


switch myPoint {
case (0..<Double.infinity, 0..<Double.infinity):
    print("Q1")
case let (x,y) where x < 0 && abs(y) == y:
    print("Q1")
case (-Double.infinity..<0, 0..<Double.infinity):
    print("Q2")
case let (a,b) where abs(a) != a && abs(b) == b:
    print(a)
    print("Q2")
default:
    break
}


let pAndQ: (Bool, Bool)
pAndQ = (true, false)


switch pAndQ {
case (true, false):
    print("|| works")
case (false, true):
    print("|| works")
case (true, true):
    print("|| and && both work")
case (false, false):
    print("Neither works")
}

let pAndQAndR: (Bool, Bool, Bool) = (true, false, true)

switch pAndQAndR {
case (true, true, true):
    print("And and Or work")
case (false, false, false):
    print("Nothing works")
default:
    print("Or works")
}


let firstName = "Ph"
let lastName: String

if firstName == "Peter" {
    lastName = "Gabriel"
} else if firstName == "Phil" {
    lastName = "Collins"
} else {
    lastName = "Unknown"
}
let fullName = firstName + " " + lastName