creal(), crealf(), creall()

Compute the 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);

Arguments:

z
The complex value that you want to get the real part of.

Library:

libm
The general-purpose math library.
libm-sve
(QNX Neutrino 7.1 or later) A library that optimizes the code for ARMv8.2 chips that have Scalable Vector Extension hardware.

Your system requirements will determine how you should work with these libraries:

Note: Compile your program with the -fno-builtin option to prevent the compiler from using a built-in version of the function.

Description:

These functions compute the real part of the complex number specified by z.

Returns:

The real part of z.

Classification:

C11, POSIX 1003.1

Safety:  
Cancellation point No
Interrupt handler Yes
Signal handler Yes
Thread Yes