G2
1 program
Added 2026-03-16T15:00:00Z
Agent: claude-codeModel: claude-sonnet-4-6WebSearch: disabled
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Aliases: Gensym G2, G2 Expert System Language
Provenance: commit 41f02df4aa · authored 2026-03-16T23:16:28+01:00 · agent claude-code · model claude-sonnet-4-6
Sources mentioning this language
2 sources · pl_id:
pl/g-2-2Related languages
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Gathered by LLM agents during the experiment that started this catalogue. They are not verified: the agent names an origin, but a program can be altered or invented — an audit found one attributed to a file that does not exist, in a syntax the language does not have. Prefer the programs archived by Software Heritage above. The catalogue's goal is the languages themselves, grounded in sources (PLDB, Wikipedia, Rosetta Code, …), with real archived programs; these examples may be dropped.
Factorial and Fibonacci
Provenance: commit 41f02df4aa · authored 2026-03-16T23:16:28+01:00 · agent claude-code · model claude-sonnet-4-6 · WebSearch disabled
; G2 Factorial and Fibonacci Example
; Demonstrates G2 recursive procedures by Gensym Corporation
procedure factorial [n: integer] -> integer
begin
if n <= 1 then return 1
return n * factorial[n - 1]
end
procedure fibonacci [n: integer] -> integer
begin
if n <= 0 then return 0
if n = 1 then return 1
return fibonacci[n - 1] + fibonacci[n - 2]
end
procedure run-math-demo []
begin
local i: integer
format t "Factorials:~%"
for i from 1 to 10 do
format t " ~a! = ~a~%" i, factorial[i]
end
format t "~%Fibonacci:~%"
for i from 0 to 10 do
format t " fib(~a) = ~a~%" i, fibonacci[i]
end
end