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GeezerVison is showing www.wikifunctions.org — Wikifunctions

Welcome to Wikifunctions

the free library of ⏳ Function is being called… functions that anyone can edit.

Welcome!

Wikifunctions is a Wikimedia project for everyone to collaboratively create and maintain a library of code functions to support the Wikimedia projects and beyond, in the world's natural and programming languages.

A "function" is a sequence of programming instructions that makes a calculation based on data you provide. Functions can answer questions, such as how many days have passed between two dates, or the distance between two cities.

We are currently primarily focused on functions related to Wikidata Lexemes. The Lexicographical data from Wikidata and functions to process it are essential for the goal of an Abstract Wikipedia. A tutorial on how Wikifunctions can be used with Wikidata right now is available.

Get started

Wikifunctions in 7 minutes
  • Run a function
  • Project chat
  • Community portal
  • Suggest a function
  • Catalogue of available functions

Functions to try out

  • Caesar cipher (Latin alphabet) (Z12812): rotates letters in the Latin alphabet forward by a defined number of places
  • is prime (Z12427): True, if the provided natural number is prime (i.e., it has exactly 2 positive divisors).
  • age (Z20756): returns the difference between two dates on the Gregorian calendar in years
  • how many days between two days in the year (Z20733): number of days (non-inclusive) between two days of the year
  • is Gregorian year leap year? (Z20181): returns True if the specified year in the Gregorian calendar (the one currently used in most parts of the world) has 366 days (February 29th added), and False if the year has 365 days
  • Bayes' theorem conditional probability P(A|B) (Z20000): The probability of A occurring given that B is known to have occurred. Given by Bayes' theorem: P(A|B) = P(A)*P(B|A)/P(B)
  • minimum of natural number list (Z19509): returns the smallest element from a list of natural numbers; if the list is empty, returns 0.
  • first text of lexeme matching grammatical features (Z19530): Description missing

more functions…

Learn and contribute

Learn about Wikifunctions
  • About Wikifunctions
  • Wikifunctions introduction
  • FAQ
  • Glossary
Contribute to Wikifunctions
  • Create an object
  • Get involved as a translator
Get help with Wikifunctions
  • Questions? Ask at the Project chat or our Telegram/IRC channel!
  • Report a technical problem
    • Status page lists major known issues and problems

News

Volunteer's Corners
  • The next Volunteers' Corner will be at 11:00 UTC on 2026-11-09 on Google Meet at meet.google.com/xuy-njxh-rkw.
  • The most recent Volunteer's Corner is available on Commons
Recent status updates about Wikifunctions
  • 2026-11-04: A new Type for NLG Functions?
  • 2026-10-30: Errors and fallbacks in Abstract Wikipedia
  • 2026-10-25: Wikiabstrak app
  • 2026-10-17: Changes in evaluator representations
  • 2026-10-09: Quarterly planning
More news
Wikifunctions is part of the non-profit, multilingual, free-content Wikimedia family.
  • Wikipedia
    Encyclopedia
  • Wikidata
    Knowledge base
  • Wikimedia Commons
    Media repository
  • Wiktionary
    Dictionary and thesaurus
  • Wikibooks
    Textbooks and manuals
  • Wikiquote
    Collection of quotations
  • Wikisource
    Library
  • Wikiversity
    Learning resources
  • Wikivoyage
    Travel guides
  • Wikispecies
    Directory of species
  • Incubator
    New language versions
  • Meta-Wiki
    Project coordination
  • MediaWiki
    MediaWiki development
  • Wikimania
    Event coordination


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