ios - swift 函数的默认返回类型是什么？

Question

Swift 中函数的默认返回类型是什么？

我试着谷歌它，但我不确定。任何人都可以分享他们的知识吗？

提前致谢。

Answer 1

来自 docs :

Strictly speaking, this version of the greet(person:) function does still return a value, even though no return value is defined. Functions without a defined return type return a special value of type Void. This is simply an empty tuple, which is written as ().

func greet(person: String) {
    print("Hello, \(person)!")
}
greet(person: "Dave")
// Prints "Hello, Dave!"