Manpage of INFNAN

INFNAN

Section: Linux Programmer's Manual (3)
Updated: 1993-06-02
Index
 

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 errorcan be ERANGEto represent infinity or anything else to represent NaN. errnois also set.  

RETURN VALUE

If erroris ERANGE(Infinity), HUGE_VALis returned.

If erroris -ERANGE(-Infinity), -HUGE_VALis returned.

If erroris anything else, NAN is returned.  

ERRORS

EDOM
The value of erroris "not-a-number" (NaN).
ERANGE
The value of erroris positive infinity or negative infinity.
 

CONFORMING TO

4.3BSD.  

NOTES

This obsolete function was provided in libc4 and libc5, but is not available in glibc2.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
CONFORMING TO
NOTES

This document was created by man2html, using the manual pages.
Time: 22:27:51 GMT, June 20, 2016