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creal
Section: C Library Functions (3) Updated: 202-0-08 Index
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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)
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
| Interface | Attribute | Value
|
|
creal(),
crealf(),
creall()
| Thread safety | M-Safe
|
VERSIONS
GCC supports also __real__.
That is a GNU extension.
STANDARDS
C11, POSIX.-2008.
HISTORY
glibc 2.1.
C99, POSIX.-2001.
SEE ALSO
cabs(3),
cimag(3),
complex(7)
Index
- NAME
-
- LIBRARY
-
- SYNOPSIS
-
- DESCRIPTION
-
- ATTRIBUTES
-
- VERSIONS
-
- STANDARDS
-
- HISTORY
-
- SEE ALSO
-
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