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What is Kotlin?

"Project Kotlin" is a codename for a statically typed programming language compiled to JVM byte code and JavaScript.
It is developed by JetBrains and distributed under Apache 2 Open Source License.

Kotlin is Under Development
Please report bugs to our Issue Tracker

See our blog. Follow us on Twitter. Join our forum.

Hello, world!

package hello 
 
fun main(args : Array<String>) { 
  println("Hello, world!") 
}

More Examples

Kotlin Web Demo offers many runnable example programs.
You can also write your own programs right in the browser and run them on JVM or JavaScript platform.

Documentation

The Getting Started page describes the set-up process.
The Docs Home page will guide you through the documentation.
See this presentation for the introduction:

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Slides and video from StrangeLoop 2011

Source Code

Check out the sources on GitHub.
Sources are distributed under Apache 2 license.
Nightly builds can be downloaded from our build server.
You can also use http://www.jetbrains.com/kotlin/eap-plugin-repository/updatePlugins.xml to set up a plugin repository in IntelliJ IDEA.

The IDE plugin requires the latest EAP build of IntelliJ IDEA 11.1.

Kontributions

IDE

Recommended reading

Twitter

Kotlin Events

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