NAME¶
infnan - deal with infinite or not-a-number (NaN) result
SYNOPSIS¶
#include <math.h>
double infnan(int error);
Link with
-lm.
DESCRIPTION¶
The
infnan() function returns a suitable value for infinity and
"not-a-number" (NaN) results. The value of
error can be
ERANGE to represent infinity or anything else to represent NaN.
errno is also set.
RETURN VALUE¶
If
error is
ERANGE (Infinity),
HUGE_VAL is returned.
If
error is -
ERANGE (-Infinity), -
HUGE_VAL is returned.
If
error is anything else, NAN is returned.
ERRORS¶
- EDOM
- The value of error is "not-a-number" (NaN).
- ERANGE
- The value of error is positive infinity or negative infinity.
4.3BSD.
NOTES¶
This obsolete function was provided in libc4 and libc5, but is not available in
glibc2.
COLOPHON¶
This page is part of release 4.10 of the Linux
man-pages project. A
description of the project, information about reporting bugs, and the latest
version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
