Mastering Kotlin

Class functions

We can add functions to a class to add functionality and to interact with that class. Like in Java, we can refer to a function on a class as a method. Methods are tied to the instance of the class they are associated with.

Defining a method is fundamentally the same as defining a top-level function, with the primary exception being that a method is declared within a class body. In the following example, we've defined a Person class that has a single method named printName():

class Person(    val firstName: String,     val lastName: String) {    fun printName() {        println("$firstName $lastName")    }}

Note that the definition of printName doesn't look any different than the other top-level functions we've defined in this chapter.

To invoke ...