CARG(3P)

🎀 PROLOG 🎀

okay bestie, real talk before we even start: this manual page is part of the POSIX Programmer's Manual. That's the vibe. But heads up — the Linux implementation of this interface may differ, so if you're on Linux you gotta go consult the corresponding Linux manual page for the deets on Linux behavior. OR, plot twist, the interface might not even be implemented on Linux at all. 🙈 iykyk.

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✨ NAME ✨

carg, cargf, cargl — complex argument functions 💅 (yes this is the POSIX Programmer's Manual, section 3P, we're fancy here)

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🌸 SYNOPSIS 🌸

#include <complex.h>

double carg(double complex z);
float cargf(float complex z);
long double cargl(long double complex z);

like. three flavors. same energy. pick your precision. 🫶

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💖 DESCRIPTION 💖

So the functionality described on this reference page? It's aligned with the ISO C standard. periodt. And if there's any conflict between what's written here and the ISO C standard — that's unintentional, nobody did that on purpose, we promise. This volume of POSIX.1‐2017 defers to the ISO C standard, always. 👑

Now the actual tea: these functions shall compute the argument (also called the phase angle) of z, with a branch cut along the negative real axis. yes that's a whole thing. the negative real axis is where the drama happens. 💀

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🌈 RETURN VALUE 🌈

These functions shall return the value of the argument in the interval [-π, +π]. that's it, that's the range, she stays in her lane, iconic behavior honestly. ⭐

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🦋 ERRORS 🦋

No errors are defined. literally none. flawless. ✨

(oh and just so you know, the following sections are informative — not the binding stuff, just the bonus lore.)

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🍓 EXAMPLES 🍓

None. 😭 (i know. i wanted one too.)

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🧚 APPLICATION USAGE 🧚

None. 🎀

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💜 RATIONALE 💜

None. 🫶

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🔥 FUTURE DIRECTIONS 🔥

None. 👑

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👑 SEE ALSO 👑

• cimag()
• conj()
• cproj()

The Base Definitions volume of POSIX.1‐2017, <complex.h> — go read it bestie, it's giving reference material. 📚

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💅 COPYRIGHT 💅

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 .

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okay that's the whole page, no notes, you ate. this was CARG(3P) from IEEE/The Open Group, dated 2017 — and the Linux man-pages source/version and date line lives right there at the bottom of the original, so shoutout to that footer too. bye bestie, go compute some phase angles 💖✨