Functional Programming in Kotlin

Appendix B. Exercise solutions

B.1 Before you proceed to the solutions

This appendix contains all the solutions to the exercises in the book. Please make the best attempt possible to do the exercises prior to skipping here to get the answers. The book is written in such a way that doing the exercises is a crucial part of your learning experience. Each exercise builds on the knowledge gained from the previous one. Please only use this appendix to verify your answers or to help you if you are absolutely stuck.

B.2 Getting started with functional programming

Exercise 2.1

fun fib(i: Int): Int {
    tailrec fun go(cnt: Int, curr: Int, nxt: Int): Int =
        if (cnt == 0)
            curr
        else go(cnt - 1, nxt, curr + nxt)
    return go(i, 0, 1)
}

Exercise 2.2

val <T> ...