Kotlin Functions (simple)

snippet.kt

// block body
fun sum(a: Int, b: Int) : Int {
  return a + b
}

// expression body, inferred return type 
fun sum(a: Int, b: Int) = a + b

// variable of a function type
val foo: (Int, Int) -> Int = sum

// variable of a nullable function type
var foo: ((Int, Int) -> Int)? = sum

// Unit is Kotlin's void (it is optional)
fun hello(name: String) : Unit {
  println("Hello $name!")
}