CATANH(3POSIX)

💖 CATANH(3POSIX) — the complex arc hyperbolic tangent situation 💖

okay bestie, quick vibe check before we dive in: this is a page from the POSIX Programmer's Manual (yes, the POSIX Programmer's Manual, that's the manual name, we're being official today 💅).

PROLOG heads-up: this manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (so 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. 🙈

---

✨ NAME ✨

catanh, catanhf, catanhl — complex arc hyperbolic tangent functions 🦋

---

🌸 SYNOPSIS 🌸

#include <complex.h>

double complex catanh(double complex z);
float complex catanhf(float complex z);
long double complex catanhl(long double complex z);

---

💜 DESCRIPTION 💜

So the functionality described on this reference page is aligned with the ISO C standard. If there's ever any conflict between what's written here and what the ISO C standard says, that conflict is unintentional, bestie — nobody's trying to start drama. This volume of POSIX.1‐2017 defers to the ISO C standard, periodt.

These functions shall compute the complex arc hyperbolic tangent of z, with branch cuts outside the interval [-1, +1] along the real axis. Not inside. Outside. The way it ate that interval up and left it alone. 👑

---

⭐ RETURN VALUE ⭐

These functions shall return the complex arc hyperbolic tangent value, living in the range of a strip that's mathematically unbounded along the real axis and sitting pretty in the interval [-iπ/2, +iπ/2] along the imaginary axis. iykyk. 💫

---

😭 ERRORS 😭

No errors are defined. Not a single one. She's flawless, she doesn't do errors. 💅

The following sections are informative — which is fancy-speak for "chill, background reading, not requirements."

---

🎀 EXAMPLES 🎀

None. Nada. Nothing to see here. (The iconics don't need examples, they just are.) 🌈

---

🧚 APPLICATION USAGE 🧚

None. Still nothing. Bestie, we're just here for the vibes and the branch cuts.

---

💀 RATIONALE 💀

None.

---

🌟 FUTURE DIRECTIONS 🌟

None.

---

🫶 SEE ALSO 🫶

• ctanh()

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

---

👑 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 — so if they beef, the original wins, no cap. 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 — courtesy of IEEE/The Open Group, 2017, CATANH(3POSIX) 💖 stan a hyperbolic tangent, stay hydrated, and remember: branch cuts outside [-1, +1], always ✨