函数和闭包
使用 func 来声明一个函数
func greet(name: String,day:String) -> String{
return "Hello \(name), today is \(day)."
}
println(greet("Zmsky","HapplyDay”))
使用元祖来返回多个值
func getGasPrices() -> (Double,Double,Double){
return (3.59,3.69,3.79)
}
getGasPrices()