Swift - func 함수 선언 지시자

func getValue() -> Double {

    return 3.31

}

getValue()

func getTuple(strName:String, withAge:Int) -> (name:String, age:Int){

    return (strName, withAge)

}

getTuple("Jsson lee", withAge: 39).name

func myNewFunc(tuple:(name:String, age:Int)) -> String {

    return tuple.name

}

myNewFunc(("nicegood", 13))

func funcWithoutReturn() {

    print("this is non-returnable function")

}

funcWithoutReturn()

func funcWithDefaultParameter(inputName:String="JOHN DOE", age:Int) -> (killCount:Int, lastAccessPoint:String) {

    return (age, "Kill House")

}

funcWithDefaultParameter("hello", age: 3)

var newDate = NSDate()

func getAveList(scores:Int..., total:Double) -> Double {

    var total = 0

    for p in scores{

        total += p

    }

    return Double(total)/Double(scores.count)

}

func getAve(scores:[Int]) -> Double {

    var total = 0

    for p in scores{

        total += p

    }

    return Double(total)/Double(scores.count)

}

getAve([0,0,0,1,2,3,4])

getAveList(1,2,3,4, total:3.1)

var value = 12

func testFun(var param:Int) -> Int {

    param += 1

    return param

}

print(testFun(value))

print(value)

var value2 = 12

func testFun2(inout param:Int) -> Int {  // inout 지시자는 원형타입의 파라미터 주소값을 넘기는 형태로 함수 실행토록 해줌

    param += 1

    return param

}

print(testFun2(&value2))

print(value2)