# FreeBSD Manual Pages

```CIMAG(3)		 BSD Library Functions Manual		      CIMAG(3)

NAME
cimag, cimagf, cimagl, conj, conjf, conjl,	cproj, cprojf, cprojl, creal,
crealf, creall -- functions to manipulate complex numbers

LIBRARY
Math Library (libm, -lm)

SYNOPSIS
#include <complex.h>

double
cimag(double complex z);

float
cimagf(float complex z);

long double
cimagl(long double	complex	z);

double complex
conj(double complex z);

float complex
conjf(float complex z);

long double complex
conjl(long	double complex z);

double complex
cproj(double complex z);

float complex
cprojf(float complex z);

long double complex
cprojl(long double	complex	z);

double
creal(double complex z);

float
crealf(float complex z);

long double
creall(long double	complex	z);

DESCRIPTION
Let a+b*i denote the complex number z.

The creal() functions return the real part	a, and the cimag() functions
return the	imaginary part b.

The conj()	functions return the complex conjugate a-b*i.

The cproj() functions return the projection onto the Riemann sphere.  If
z contains	an infinite component, then the	result is infinity +- 0*i,
where the (zero) imaginary	part of	the result has the same	sign as	b.
Otherwise,	the result is z.

These functions do	not signal any floating	point exceptions.

STANDARDS
The cimag(), conj(), cproj(), and creal() functions conform to ISO/IEC
9899:1999 ("ISO C99").

HISTORY
The cimag(), conj() and creal() functions first appeared in FreeBSD 5.3.
The cproj() functions appeared in FreeBSD 8.0.

BSD				August 7, 2008				   BSD
```

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | STANDARDS | HISTORY

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=cimag&sektion=3&manpath=FreeBSD+13.0-RELEASE+and+Ports>