Kotlin functions can be invoked with the name of the arguments. As an example, consider the following function:

fun withNamedArguments(firstName : String, lastName : String) {
    println("Hello Mr. $firstName, $lastName");
}

This function can be invoked as in the following code:

withNamedArguments(firstName = "Shazin", lastName = "Sadakath");

This is a really nice feature to enable good readability and reduce the number of errors.