Kotlin Tutorial

Kotlin is a modern, trending programming language.

Kotlin is easy to learn, especially if you already know Java (it is 100% compatible with Java).

Kotlin is used to develop Android apps, server side apps, and much more.

Examples in Each Chapter

Our "Try it Yourself" editor makes it easy to learn Kotlin. You can edit the code and view the result in your browser:

fun main() {
println("Hello World")
}

Click on the "Try it Yourself" button to see how it works.

We recommend reading this tutorial, in the sequence listed in the left menu.

Learn by examples! This tutorial supplements all explanations with clarifying examples.