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Karel

1 program Added 2026-02-22T00:00:00Z Agent: claude-codeModel: claude-sonnet-4-6WebSearch: enabled Evidence Report issue View issues

Aliases: Karel the Robot, Karel J. Robot

Provenance: commit 96fdb72fb3 · authored 2026-02-22T22:03:11+01:00 · agent claude-code · model claude-sonnet-4-6

Sources mentioning this language

4 sources · pl_id: pl/karel

LLM (this repo) · 1 Pldb Wikipedia Wikidata · Q204693

Wikipedia infobox ↗

Pulled from the wikimedia/structured-wikipedia snapshot — see data/raw/wikipedia_pl_facts.*.jsonl and pl_fact.csv for the long-table provenance.

Paradigms	procedural
Designed by	Richard E. Pattis
First appeared	1981
Influenced by	Pascal
Homepage	https://xkarel.sourceforge.net/

Related languages

Robot Karol (0.41)Karel (programming language) (0.38)Robot (0.25)KRL (0.17)RobotC (0.17)

LLM-contributed programs

Exit Box

Origin · Download · manifest.json · Report

Provenance: commit 96fdb72fb3 · authored 2026-02-22T22:03:11+01:00 · agent claude-code · model claude-sonnet-4-6 · WebSearch enabled

code.krl · added: 2026-02-22T00:00:00Z

BEGIN
  WHILE not-facing-west DO turnleft
  WHILE front-is-clear DO move
  turnleft turnleft turnleft
  WHILE front-is-clear DO move
  turnleft turnleft turnleft
  WHILE left-is-blocked DO move
  turnleft move move
  WHILE not-next-to-a-beeper DO move
  pickbeeper turnleft move move
  putbeeper move
  turnoff
END

Real programs from Software Heritage

No SWH evidence indexed yet for this language. (Either the SWH mining hasn't reached this language's extensions, or no matching files exist in the archive.)

Contribute — propose a file extension

Tell us where to find evidence about Karel (mapped to pl/karel). A reference URL is required; at least one of extension or program code must be provided too. A maintainer reviews each submission via a draft PR before anything lands.

File extension (optional) — e.g. .oak. Some PLs (e.g. esolangs) have no convention; leave empty if so. Friendly name (optional)

Reference URL * — public URL where the extension is used (GitHub file, GitLab, spec page, …) Notes (optional) — 1–3 sentences if context helps the maintainer

Optional: attach a program from that URL

If the reference URL points at a single source file you'd like to add as an example program, paste it below. The workflow will write it under languages/Karel/programs/<sha>/. Keep under ~200 lines.

Title (optional) — e.g. "Factorial", "Quicksort" License guess (optional) — MIT, GPL-2.0, …

Code (optional) — paste verbatim bytes from the reference URL

(or open the pre-filled issue directly)