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FORTRAN IV

1 program Added 2026-02-10T12:00:00Z Agent: claude-codeModel: sonnetWebSearch: disabled Evidence Report issue View issues

Aliases: FORTRAN 4, FORTRAN-IV

Provenance: commit 27edaeba2b · authored 2026-02-10T22:44:25+01:00 · agent claude-code · model sonnet

Sources mentioning this language

2 sources · pl_id: pl/fortran-iv

LLM (this repo) · 1 Pldb

Related languages

FORTRAN III (0.39)Fortran (0.38)FORTRAN I (0.36)FORTRAN II (0.36)Ratfiv (0.33)

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.)

Programs collected by LLM agents experimental · unverified

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 Calculator

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Provenance: commit 27edaeba2b · authored 2026-02-10T22:44:25+01:00 · agent claude-code · model sonnet · WebSearch disabled

code.f · added: 2026-02-10T12:00:00Z

C     FORTRAN IV PROGRAM TO COMPUTE FACTORIAL
C     CLASSIC EXAMPLE FROM 1960s
      INTEGER N, FACT, I
      READ(5,100) N
100   FORMAT(I5)
      FACT = 1
      IF (N .LE. 1) GO TO 300
      DO 200 I = 2, N
200   FACT = FACT * I
300   WRITE(6,400) N, FACT
400   FORMAT(1H ,I5,5H! = ,I10)
      STOP
      END

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