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// 没有返回值的无参函数
func sayHello() {
// do something
}
// 返回 string 类型
func sayHello() -> String {
return "Hi, shooter!"
}
// 一个参数
func sayHello(name: String) -> String {
// do something
}
// 多个参数
func sayHello(name: String, age: Int) -> String {
return "Hi, \(name), age is \(age)!"
}
// 参数默认值
func combineName(firstName: String, lastName: String, separator: String = "-") {
return firstName + separator + lastName
}
// 可变参数
func add(numbers: Int...) -> Int {
var total = 0
for i in numbers {
total += i
}
return total
}
// 函数参数别名
func combineName(firstName first: String, lastName last: String) {
// accessing the parameters can be done by referencing
// "first" and "last" respectively
return first + " " + last;
}
var fullName = combineName(firstName: "Steve", lastName: "Wozniak")
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