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CREAL(3) Library Functions Manual CREAL(3)

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)

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).

Interface Attribute Value
creal (), crealf (), creall () Thread safety MT-Safe

STANDARDS

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)

2022-10-09 Linux man-pages 6.01