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.1-2024 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.

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, cimag, conj, cproj

XBD <complex.h>

CHANGE HISTORY

First released in Issue 6. Derived from the ISO/IEC 9899:1999 standard.