Dart vs Kotlin: functions

functions.dart

greet(String name) => print("Hello $name");

greet2(String person1, [String? person2]) {
  print("Hello $person1");
  if (person2 != null) print("Hello $person2");
}

String getGreeting({String name = "Dart"}) {
  return "Hello $name";
}

printGreeting(String getGreeting()) {
  print(getGreeting());
}

printGreetings(String getGreeting(int count)) {
  for (var count = 0; count < 10; count++) {
    print(getGreeting(count));
  }
}

main() {
  greet("David");
  greet2("One Person");
  greet2("One Person", "Another Person");
  final greeting1 = getGreeting();
  final greeting3 = getGreeting(name: "Flutter");
  printGreeting(() => "Hey Jude");
  printGreeting(getGreeting);
  printGreetings((count) => "Hi $count");
  final refToFunction = greet;
  refToFunction("ref");
}

functions.kt

fun greet(name: String) = println("Hello $name")

fun greet2(person1: String, person2: String? = null) {
    println("Hello $person1")
    person2?.let { println("Hello $it") }
}

fun getGreeting(name: String = "Dart"): String {
    return "Hello $name"
}

fun printGreeting(getGreeting: () -> String) {
    println(getGreeting())
}

fun printGreetings(getGreeting: (count: Int) -> String) {
    repeat(10) { count ->
        println(getGreeting(count))
    }
}

fun main() {
    greet("David")
    greet2("One Person")
    greet2("One Person", "Another Person")
    val greeting1 = getGreeting()
    val greeting2 = getGreeting("Flutter")
    val greeting3 = getGreeting(name = "Kotlin")
    printGreeting { "Hey Jude" }
    printGreeting(::getGreeting)
    printGreetings { count: Int -> "Hi $count" }
    val refToFunction = ::greet
    refToFunction("ref")
}