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 wordsStandard
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.
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Latest contributions:
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core, AGAIN
[385] Suggested test
Suggested Testcase
2025-07-21 02:57:44 -
core, IF
[384] Typo in test
Suggested Testcase
2025-07-21 01:53:36 -
core, UNUSED
[383] What should the behavior be if the system has no hard-coded limit on size?
Request for clarification
2025-07-19 01:57:17 -
notation
[382] Wording on ccc prohibits \" inside S\"
Request for clarification
2025-07-02 03:31:11
Latest replies:
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testsuite
F.3.18 typo
Comment
2025-07-21 13:54:29 -
core, UNUSED
What should the behavior be if the system has no hard-coded limit on size?
Request for clarification
2025-07-20 12:02:55 -
notation
Wording on ccc prohibits \" inside S\"
Request for clarification
2025-07-11 13:19:49 -
notation
Wording on ccc prohibits \" inside S\"
Request for clarification
2025-07-11 13:18:22
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.