FMAX(3POSIX)

📦 version 2017a, in debian bookworm, debian trixie, ubuntu jammy, ubuntu noble, ubuntu resolute, ubuntu stonking

💖 FMAX(3POSIX) — bestie edition 💖

okay so this little gem lives in the POSIX Programmer's Manual, and before we even get into it there's a lil heads-up you need to know about 👇

⚠️ PROLOG (read this first, fr)

This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

like… she might not even exist on your machine bestie. check first. 🫶

✨ NAME ✨

fmax, fmaxf, fmaxl — determine maximum numeric value of two floating-point numbers

she's literally just picking the bigger one. that's the whole job. 💅

🌸 SYNOPSIS 🌸

#include <math.h>

double fmax(double x, double y);
float fmaxf(float x, float y);
long double fmaxl(long double x, long double y);

three flavors, one vibe. pick your precision, queen. 👑

🦋 DESCRIPTION 🦋

The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1‐2017 defers to the ISO C standard.

so like, if this page and the ISO C standard ever beef, the standard wins. periodt. no cap.

These functions shall determine the maximum numeric value of their arguments.

and here's the iconic part — NaN arguments shall be treated as missing data: if one argument is a NaN and the other numeric, then these functions shall choose the numeric value.

not me treating NaN like a ghosted text message and just going with the one that actually showed up 😭💀

💜 RETURN VALUE 💜

Upon successful completion, these functions shall return the maximum numeric value of their arguments.

If just one argument is a NaN, the other argument shall be returned.

If x and y are NaN, a NaN shall be returned.

so: two numbers → the bigger one. one number + one ghost → the number. two ghosts → ghost. 👻

🔥 ERRORS 🔥

No errors are defined.

she literally cannot fail. main character energy tbh. ✨

The following sections are informative.

🎀 EXAMPLES 🎀

None.

i know. i know. tragic. no example slay today. 😭

🌈 APPLICATION USAGE 🌈

None.

🧚 RATIONALE 🧚

None.

⭐ FUTURE DIRECTIONS ⭐

None.

💫 SEE ALSO 💫

  • fdim()
  • fmin()

The Base Definitions volume of POSIX.1‐2017, <math.h>

iykyk — fmin() is her twin, fdim() is the cousin. 💖

Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .

and that's the whole page, bestie 🫶 this one was published by IEEE/The Open Group back in 2017, and it goes by the name FMAX(3POSIX) — go forth and take the max of things, you absolute icon 💅✨

📦 where this page comes from