Mastering Kotlin Essentials/

...

/

Named Parameter and Default Arguments

Named Parameter and Default Arguments

Understand function parameter flexibility and clarity with named arguments.

We'll cover the following...

When we declare functions, we often specify optional parameters. A good example is joinToString, which transforms an iterable into a String. We can use it without any arguments, or we can also change its behavior with concrete arguments.

Press + to interact
Kotlin 1.5
fun main() {
    val list = listOf(1, 2, 3, 4)
    println(list.joinToString()) // 1, 2, 3, 4
    println(list.joinToString(separator = "-")) //  1-2-3-4
    println(list.joinToString(limit = 2)) //  1, 2, ...
}

Default values for parameters

Many more functions in Kotlin use optional parametrization, but how is this ...