Kotlin Programming Cookbook

How to do it…

In the following steps, we will learn how to use polymorphism in Kotlin:

1. Let's start with compile-time polymorphism. In compile-time polymorphism, the name functions, that is, the signature remains the same but parameters or return type is different. At compile time, the compiler then resolves which functions we are trying to call based on the type of parameters and more. Check out this example:

fun main(args: Array<String>) {    println(doubleOf(4))        println(doubleOf(4.3))        println(doubleOf(4.323))}fun doubleOf(a: Int): Int {    return 2*a}fun doubleOf(a: Float): Float {    return 2*a}fun doubleOf(a: Double): Double {    return 2.00*a}

Here's the output of the preceding code:

88.68.646

2. Now, let's talk about run-time polymorphism. In ...