NAME | SYNOPSIS | DESCRIPTION | VERSIONS | ATTRIBUTES | CONFORMING TO | NOTES | SEE ALSO | COLOPHON

CABS(3)                   Linux Programmer's Manual                  CABS(3)

NAME         top

       cabs, cabsf, cabsl - absolute value of a complex number

SYNOPSIS         top

       #include <complex.h>

       double cabs(double complex z);
       float cabsf(float complex z);
       long double cabsl(long double complex z);

       Link with -lm.

DESCRIPTION         top

       These functions return the absolute value of the complex number z.
       The result is a real number.

VERSIONS         top

       These functions first appeared in glibc in version 2.1.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       attributes(7).

       ┌─────────────────────────┬───────────────┬─────────┐
       │Interface                Attribute     Value   │
       ├─────────────────────────┼───────────────┼─────────┤
       │cabs(), cabsf(), cabsl() │ Thread safety │ MT-Safe │
       └─────────────────────────┴───────────────┴─────────┘

CONFORMING TO         top

       C99, POSIX.1-2001, POSIX.1-2008.

NOTES         top

       The function is actually an alias for hypot(a, b) (or, equivalently,
       sqrt(a*a + b*b)).

SEE ALSO         top

       abs(3), cimag(3), hypot(3), complex(7)

COLOPHON         top

       This page is part of release 4.08 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                          CABS(3)