trusty (3) cargl.3.gz

Provided by: manpages-dev_3.54-1ubuntu1_all bug

NAME
       carg, cargf, cargl - calculate the complex argument


SYNOPSIS
       #include <complex.h>

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

       Link with -lm.


DESCRIPTION
       A complex number can be described by two real coordinates.  One may use rectangular coordinates and gets

           z = x + I * y

       where x = creal(z) and y = cimag(z).

       Or one may use polar coordinates and gets

           z = r * cexp(I * a)

       where  r = cabs(z) is the "radius", the "modulus", the absolute value of z, and a = carg(z) is the "phase
       angle", the argument of z.

       One has:

           tan(carg(z)) = cimag(z) / creal(z)


RETURN VALUE
       The return value is the range of [-pi,pi].


VERSIONS
       These functions first appeared in glibc in version 2.1.


CONFORMING TO
       C99.


SEE ALSO
       cabs(3), complex(7)


COLOPHON
       This page is part of release 3.54 of the Linux man-pages project.  A  description  of  the  project,  and
       information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.

                                                   2008-08-11                                            CARG(3)