Tutorials References Exercises Videos NEW Menu
Paid Courses Website NEW

Kotlin Class Functions


Kotlin Class Functions

You can also use functions inside a class, to perfom certain actions:

Example

Create a drive() function inside the Car class and call it:

class Car(var brand: String, var model: String, var year: Int) {
  // Class function
  fun drive() {
    println("Wrooom!")
  }
}

fun main() {
  val c1 = Car("Ford", "Mustang", 1969)

  // Call the function
  c1.drive() 
}
Try it Yourself »

Tip: When a function is declared inside a class, it is known as a class function, or member function.

Note: When an object of the class is created, it has access to all of the class functions.


Class Function Parameters

Just like with regular functions, you can pass parameters to a class function:

Example

Create two functions: drive() and speed(), and pass parameters to the speed() function:

class Car(var brand: String, var model: String, var year: Int) {
  // Class function
  fun drive() {
    println("Wrooom!")
  }

  // Class function with parameters
  fun speed(maxSpeed: Int) {
    println("Max speed is: " + maxSpeed)
  }
}

fun main() {
  val c1 = Car("Ford", "Mustang", 1969)

  // Call the functions
  c1.drive()
  c1.speed(200)
}
Try it Yourself »