Functions

Functions in Kotlin

Functions are declared with fun:

fun add(x: Int, y: Int): Int {
    return x + y
}

For single-expression functions, you can use the concise = syntax:

fun add(x: Int, y: Int): Int = x + y
fun square(n: Int): Int = n * n

Call functions normally:

println(add(3, 4))    // 7
println(square(5))    // 25

Your Turn

Write a function cube(n: Int): Int that returns n cubed, and a function sumOfCubes(a: Int, b: Int): Int that returns the sum of the cubes of a and b.