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penberg/fjord

Fjord, F# programming language for the JVM.
Source code at GitHub https://github.com/penberg/fjord
penberg/fjord.json
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  "createdAt": "2013-03-15T23:23:10Z",
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  "description": "Fjord, F# programming language for the JVM.",
  "fullName": "penberg/fjord",
  "homepage": "",
  "language": "Java",
  "name": "fjord",
  "pushedAt": "2015-04-23T18:37:20Z",
  "stargazersCount": 209,
  "topics": [],
  "updatedAt": "2025-11-06T14:50:54Z",
  "url": "https://github.com/penberg/fjord"
}

Fjord, F# programming language for the JVM.

Section titled “Fjord, F# programming language for the JVM.”

Build Status

Fjord is an implementation of the [F#][F#] programming language for the JVM.

The implementation is at very early stages, so if you are looking to use F# on the JVM, Fjord is probably not for you. However, if you are interested in hacking on F# implementation for the JVM, welcome on board!

Building Fjord

Section titled “Building Fjord”

Requirements

Section titled “Requirements”

Fjord is built and packaged with [Apache Maven][Apache Maven] and requires Java 1.8 or higher to build and run.

Building from sources

Section titled “Building from sources”

To build F#, run:

export MAVEN_OPTS="-Xmx1g"
mvn package

Trying it out

Section titled “Trying it out”

To launch the F# interactive shell run:

./bin/fji

and you are greeted with:

Fjord


For help type #help
> _

You can then evaluate F# expressions:

> let x = 1 + 2
val x = 3

Features

Section titled “Features”
  • Aims at F# 3.0 language compatibility

Want to help?

Section titled “Want to help?”

Want to help? Grab the [F# specification][F# specification], fork the GitHub repository, and send a pull request!

For questions and comments, drop me a line on [Twitter] or on #fjord at irc.freenode.net, or send me email at penberg@iki.fi.

License

Section titled “License”

Copyright © 2013 Pekka Enberg and contributors.

Fjord is distributed under the Apache License, Version 2.0.

Credits

Section titled “Credits”

(in order of appearance)

  • Alex Biehl

[Apache Maven] !: http://maven.apache.org/ [F# specification] !: http://fsharp.org/about/files/spec.pdf [F#] !: http://fsharp.org/ [Twitter] !: https://twitter.com/penberg