| CABS(3) | Linux Programmer's Manual | CABS(3) |
cabs, cabsf, cabsl - absolute value of a complex number
#include <complex.h>
double cabs(double complex z);
float cabsf(float complex z);
long double cabsl(long double complex z);
Link with -lm.
These functions return the absolute value of the complex number z. The result is a real number.
These functions first appeared in glibc in version 2.1.
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
| cabs (), cabsf (), cabsl () | Thread safety | MT-Safe |
C99, POSIX.1-2001, POSIX.1-2008.
The function is actually an alias for hypot(a, b) (or, equivalently, sqrt(a*a + b*b)).
This page is part of release 5.10 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
| 2015-04-19 |