creal man page

creal, crealf, creall — get real part of a complex number

Synopsis

#include <complex.h>

double creal(double complex z);
float crealf(float complex z);
long double creall(long double complex z);

Link with -lm.

Description

These functions return the real part of the complex number z.

One has:

z = creal(z) + I * cimag(z)

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).

InterfaceAttributeValue
creal(), crealf(), creall()Thread safetyMT-Safe

Conforming to

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

Notes

The gcc supports also __real__. That is a GNU extension.

See Also

cabs(3), cimag(3), complex(7)

Colophon

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Referenced By

cimag(3), complex(7).

crealf(3) and creall(3) are aliases of creal(3).

2015-04-19 Linux Programmer's Manual