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Python

JavaScript

TypeScript

Java

Kotlin

Scala

Groovy

Python

Python

Category

general

Difficulty

beginner

Courses

General-purpose powerhouse. Great for beginners and experts alike.

JavaScript

JavaScript

Category

web

Difficulty

beginner

Courses

The language of the web. Runs everywhere.

TypeScript

TypeScript

Category

web

Difficulty

intermediate

Courses

JavaScript with superpowers. Type safety at scale.

Java

Java

Category

general

Difficulty

intermediate

Courses

Write once, run anywhere. Enterprise favorite.

Kotlin

Kotlin

Category

general

Difficulty

intermediate

Courses

Modern JVM language. Android's official language.

Scala

Scala

Category

general

Difficulty

advanced

Courses

Functional + OOP on the JVM. Elegant and powerful.

Groovy

Groovy

Category

general

Difficulty

intermediate

Courses

Dynamic JVM scripting language. Great for Gradle.

Everything you need to level up

Built for developers, by developers. Features that actually matter.

In-Browser Compiler

Write and run code directly in the lesson. Instant feedback, no setup needed.

Achievement System

Earn XP, unlock achievements and level up as you learn and create courses.

Community Forum

Post questions, share snippets, and help others in topic-based channels.

Creator Studio

Powerful tools to create courses with quizzes, code exercises and more.

Esoteric Languages

Brainfuck, Whitespace, Befunge and more. For those who like to experiment.

Safe Sandbox

All code runs in an isolated sandbox. No harm to your system.

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