NAME

creal crealf creall — complex real functions

SYNOPSIS

#include <complex.h>

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

DESCRIPTION

[CX] The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1-2008 defers to the ISO C standard.

These functions shall compute the real part of z.

RETURN VALUE

These functions shall return the real part value.

ERRORS

No errors are defined.

The following sections are informative.

EXAMPLES

None.

APPLICATION USAGE

For a variable z of type complex:

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

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

carg(3), cimag(3), conj(3), cproj(3)

XBD <complex.h>

CHANGE HISTORY

First released in Issue 6. Derived from the ISO/IEC 9899:1999 (“ISO C99”) standard.

End of informative text.