Day6 function

// **Day6

// **Functiion

//func SayHello (value: String, value1:String)->String {

// let str = value + "" + value1

// print("str (value)")

// return str

//}

//SayHello("Hello",value1: "World")

//let string : String = SayHello("f",value1: "f")

//func SayHello(var value:String) {

// value = "AA"

// print(value)

//}

//SayHello("hello")

//func SayHello(values:Double...){

// for item in values{

// print("item : (item)")

// }

//}

//SayHello(1.1,1.2,1.3)

// summary: the func of params is dictionary

//func SayHello(value:String,joinString value1:String) {

// var str = value + value1

// print("str = (str)")

//}

//SayHello("Hello,", joinString: "Swift")

//summary: set a out func name

//func SayHello(inout value:String) {

// value = "Hello Swift"

//}

//var str = "Hello"

//SayHello(&str)

//print("(str)")

// summary: inout func input string address out change value

//func SayHello(value:String,nums value1:String) -> (String,String) {

// return (value,value1)

//}

//var (A,B) = SayHello("Hello", nums: "World")

//print("A:(A) B:(B)")

// summary: tuples