cargl

CARG(3)			    complex math routines		      CARG(3)



NAME
       carg, cargf, cargl - calculate the argument

SYNOPSIS
       #include <complex.h>

       double carg(double complex z);

       float cargf(float complex z);

       long double cargl(long double complex z);


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 carg(z) = atan(creal(z) / cimag(z)).

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

CONFORMING TO
       C99

SEE ALSO
       cabs(3), complex(5)



				  2002-07-28			      CARG(3)