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Name

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

The creal() function returns 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

Multithreading (see pthreads(7) )

The creal(), crealf(), and creall() functions are thread-safe.

Conforming to

C99.

Notes

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

See Also

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

Colophon

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