A tiny, no-nonsense Kotlin course. Real code that compiles in your browser. A certificate at the end you can actually keep.
Print to the console and embed values in strings.
Read-only and mutable bindings — when each one fits.
Int, Double, String, Boolean — meet each one with its own example.
&& (and), || (or), and ! (not) — compose booleans into bigger conditions.
Two ways to branch — and how they relate.
for over ranges, plus modifiers like step and downTo.
Real Kotlin, compiled in your browser. No installs.
Edit, run, break, fix. Every lesson ships with runnable code.
Finish the course, download a personalised PDF certificate.