fenv_t(3type)

✨ fenv_t(3type) ✨ — like, the floating-point environment, bestie 💖

okay so real talk: this is the manual page for two lil typedefs from the Linux man-pages, and they live in the <fenv.h> cinematic universe 🌈. If you've ever wondered what's actually going on with your floating-point vibes, this is the tea. 🫖

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🌸 NAME 🌸

fenv_t, fexcept_t — floating-point environment 💅

like... the whole entire environment. the control modes AND the status flags. iconic behavior honestly.

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📚 LIBRARY 📚

Standard C library — libc 🎀

(the one you already have, bestie, no extra install required ✨)

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🦋 SYNOPSIS 🦋

#include <fenv.h>

typedef /* ... */ fenv_t;
typedef /* ... */ fexcept_t;

ngl those /* ... */ comments are doing a LOT of heavy lifting — the standard is basically like "bestie we're not telling you exactly what's inside, it's giving mystery, it's giving implementation-defined 🔥". Don't @ me, that's just what C says.

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👑 DESCRIPTION 👑

okay so let's break it down because there are literally TWO of them and they are NOT the same thing, do not conflate them, I'm begging 🙏

• fenv_t — this one represents the entire floating-point environment, and when I say entire I mean entire, including the control modes and the status flags ✨. It's the full package. main character energy. 💖
• fexcept_t — this one represents the floating-point status flags collectively 🌸. Not the control modes. Just the flags. Together. As a collective. As a girl group. 🎀

and if you want the further details — and bestie you do want the further details — go see fenv(3). that's where the plot thickens. 👀

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📏 STANDARDS 📏

C11, POSIX.1-2024 💯

so fr fr, it's standardized, it's official, it's certified slay. 👑

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🕰️ HISTORY 🕰️

C99, POSIX.1-2001 🌟

aka this has been around for a MINUTE. it was doing its thing before you were born, no cap. respect your elders. 🙈

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👀 SEE ALSO 👀

• fenv(3) — the one you actually want if you're looking for further details 💜

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okay that's the whole page, you ate that, go forth and float your points 🦋✨

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this lil rewrite was brought to you by Linux man-pages 6.20, dated 2026-02-08 — mwah, kisses, bye bestie 💖💅🎀