Kotlin Koans
Kotlin Koans — ported from https://github.com/Kotlin/kotlin-koans-edu for Libre.academy. Each exercise lives in its own lesson; fix the starter to make the tests pass.
- Kotlin
- 43 lessons
- ~9 hours
- Free
- by Libre
Learn Kotlin for free on Libre Academy with the Kotlin Koans course: 43 interactive lessons you complete by writing real code in a built-in editor, graded instantly by hidden tests. No paywall, no sign-up — it runs in your browser and the free desktop app.
What you get
- Hands-on lessons with a real editor and instant, test-graded feedback.
- Free and open source — no account required to start.
- Runs in your browser, and offline in the free desktop app.
- Kotlin desktop app (native toolchain).
What's inside
- Builders
- Classes
- Collections
- Conventions
- Generics
- Introduction
- Properties