crealf - get real part of a complex number

NAME  LIBRARY  SYNOPSIS  DESCRIPTION  ATTRIBUTES  VERSIONS  STANDARDS  HISTORY  SEE ALSO 

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NAME

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

LIBRARY

Math library (libm, −lm)

SYNOPSIS

#include <complex.h>

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

DESCRIPTION

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

One has:

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

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).

VERSIONS

GCC supports also __real__. That is a GNU extension.

STANDARDS

C11, POSIX.1-2008.

HISTORY

glibc 2.1. C99, POSIX.1-2001.

SEE ALSO

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

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