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CARG (3) | C library functions | Unix Manual Pages | :man

NAME

carg, cargf, cargl - calculate the argument

CONTENTS

Synopsis
Description

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)


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