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



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

SYNOPSIS
       #include <complex.h>

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

       Link with -lm.

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

VERSIONS
       These functions first appeared in glibc in version 2.1.

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

       allbox;  lbw24  lb  lb  l  l  l.   Interface Attribute Value T{ cabs(),
       cabsf(), cabsl() T}   Thread safety  MT-Safe

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

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

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

COLOPHON
       This  page  is  part of release 4.16 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)