Forth
An awesome stack based programming language, which is able to extend itself during runtime.
\ a comment followed by the shortest quine
source type
\ another shorty, hello world looks like that
." hello world"
\ tell me, what else can we do? ask the system itself!
words \ this will yield all defined wordsEuroForth 2025
Hamburg, 12.-14. September 2025
The 41st EuroForth conference takes place in Hamburg/Germany.
And you can be part of it, sign up here if you want to attend,or sit back and watch it virtually on twitch,(chat questions will be relayed).
Standard
This is the official website of the Forth 2012 Standard, and Forth200x committee.
You can browse and discuss the standard words or dig deeper into the standard by downloading or browsing it our workgroup website.
Be part of a living standard
Become part of the decision making process and meet your fellow Forthers.
Discuss the functions of website itself in the Meta Discussion.
Sign up, to get daily digests of all contributions and replies.
Latest contributions:
-
core, PlusStore
[411] reference implementation
Suggested reference implementation
2025-09-02 11:51:03 -
core, IMMEDIATE
[410] Suggested test for repeated use
Suggested Testcase
2025-08-26 12:27:16 -
core, ZeroEqual
[409] Hardware zero vs all bits zero
Request for clarification
2025-08-25 13:24:21 -
a-easy-visual-separator
[408] A easy visual separator
Proposal
2025-08-24 15:44:45
Latest replies:
-
core, MIN
Possible Reference Implementation
Suggested reference implementation
2025-09-08 12:13:22 -
string, CMOVE
CMOVE implementation based on MOVE
Suggested reference implementation
2025-09-08 10:48:10 -
core, IMMEDIATE
Ambiguous conditions
Comment
2025-08-31 15:57:03 -
core, ZeroEqual
Hardware zero vs all bits zero
Request for clarification
2025-08-31 10:48:02
Open(active) contributions:
Systems
Forth is a highly interactive language with interactive compilation, that's why we call the compilers Forth Systems. The parser is always visible to the programmer! Here are some modern Forth Systems to get you started.
Many more systems are listed here.
Please let us know if a modern, actively developed system is missing in this list.
Communities
Ancient, yet highly active news group.
Germany's leading Forth community, with members from Austria, Netherlands and USA.
Located in Silicon Valley, the first big Forth community.
Netherlands' group of enthusiastic users of the Forth programming language.
Unites all Forth Programmers on GitHub.
Miscellaneous information
- All times and dates are UTC and formatted in ISO8601, however the separating
Tis replaced by aBL (space)as specified in RFC3339. - The logo is public domain, for details see the github repo.