無返回值函數(shù)

func GPLTest2(name:String) {

print("無返回值函數(shù)");

}

有返回值函數(shù)

func GPLTest(name:String) -> (String,Int) {

let GPLString:String = "哈哈";

let GPLNum:Int = 11;

return(GPLString,GPLNum);

}

** 同時(shí)改變函數(shù)內(nèi)外的參數(shù)值,可以用inout關(guān)鍵字,同時(shí)調(diào)用函數(shù)的時(shí)候給參數(shù)加上前綴&**

func add(age:inout Int){

age += 1

}

調(diào)用

print("\(GPLTest(name: "1111"))");

GPLTest2(name: "111");

var age = 22;

add(age: &age);

print("\(age)");