dot. is a learning platform for aspiring developers. I explain each step, then you try it yourself. Your progress is saved on your device.
I show you a piece of code and ask what it prints. You commit to a prediction before you run it. That is when you notice where you were only guessing.
You get starter code and write the solution yourself. Hidden tests check whether it does what the task asks for.
Hints come in stages: a rough direction, then something concrete, then almost the solution. Before each one, you tell me what you have already tried.
At the end I ask you a few questions. The next lesson unlocks only when every answer is right.
Finish every course of a track, plus its final project if it has one. Then you can download a PDF certificate with your name.
Each track bundles its courses in a suggested order. Start at the beginning or jump in where you like.
Kotlin from the ground up: syntax, object orientation, functional patterns, concurrency and the internals of the JVM and compiler. The courses build on each other.
[QUALIFICATION] Final project included
How to build software that stays understandable and changeable: clean code, SOLID, design patterns, architecture, testing, collaboration and security — the engineering principles behind the code, illustrated with Kotlin.
Your name, progress and settings are saved right there.
I only need your name so I can greet you. No email, no password, no sign-up.
Export your data as a file and import it on another device. Progress, saved solutions and settings come along.
English or German, light or dark. Switch whenever you like.
I'll be right here. Come back any time and pick up where you left off.