Kotlin function notes

1. The function has no beneficial protein type. The return type is Unit. 2. You can set the default values.

private fun doSomething(flag:Boolean,age:Int =2):String{
    return "result"+age+flag
}
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3. The position of the passed parameter can be changed:

fun main(){
    doSomething(true)
    doSomething(true,1)
    doSomething(age = 1,flag = true)
}
private fun doSomething(flag:Boolean,age:Int =2):String{
    return "result"+age+flag
}
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Special functions. The quotation marks

Fun main () {` fun ` ()} fun ` fun ` () {println (" I am special function ")}Copy the code

5. Anonymous functions that return the last line of code without retrun

println({a: Int, b: String -> "Welcome to SimVillage, $a! (copyright $b)" }(2019, "Benny"))Copy the code

6. Anonymous function type inference. The following is an anonymous function that returns a String. The parameter type can also be omitted.

Var bessingFunction={a:String,b:Int -> "} print(bessingFunction("ss",1)Copy the code