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LATENT REFERENCES / TAG1

FORTRAN IV

This reference note belongs to Tag1 in Latent References, an archive curated by Keigo Yoshida. Its archive region is Stax Records. The note preserves its source text and links so that readers can trace the material behind the 3D map.

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Tag1
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Stax Records

Archived reference note

English translation of the archived note. JP shows the original text. Source links and literal code are retained; the translation does not update or independently verify the source claims.

FORTRAN IV, introduced by IBM in 1961 and later standardized as FORTRAN 66, introduced foundational language IF logical expressions, statements, and complex arithmetic expressions DATA for numerical, scientific, and engineering calculations. Designed for punched cards, it adopted fixed-format coding (using columns 7–72 for code). Key aspects of FORTRAN IV: Standardization: It was the first standardized Fortran to be widely adopted and paved the way for FORTRAN 77. Syntax: Emphasizes uppercase letters and numeric statement labels. Data types: Supported logical expressions, Boolean variables (.TRUE. or .FALSE.), and COMPLEX numbers. Subroutines: Frequently used subroutines and function procedures to avoid repeated coding. Input/output: Frequently used in combination with READ and WRITE statements to process data on tapes and cards.

Source updated 2026-05-14 · Snapshot 2026-10-08