C#
.NET Backend & APIs
Variables, types, and logic. The bedrock of everything.
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Pick a language. Each journey builds one concept on the last, from your first variable to a finished project.
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No. Everything runs in your browser. Open a lesson and start typing, on any device.
C#, Python, JavaScript, Go, and SQL, with more on the way.
Yes. The journeys start from the foundations and build up one concept at a time.
Free gives you new books every week, no credit card. Premium gives you the whole library plus hands-on practice and certificates, for $49 a year after a 7-day trial.
Yes. Cancel from your account settings and keep access through the end of your billing year.
Everything for $49 a year, or start free with no credit card.