Functions in Kotlin

In the previous chapters, we introduced the basics of Kotlin and how to write procedural and object-oriented code. The emphasis in this chapter will be on functions, how to take the first steps into functional programming, and the features that Kotlin supports that makes programming with functions easier.

In this chapter, we will cover the following topics:

• Functions and function literals
• Extension functions
• Named parameters and default parameters
• Operator overloading
• Recursion and tail recursion