1INFNAN(3)                  Linux Programmer's Manual                 INFNAN(3)
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NAME

6       infnan - deal with infinite or not-a-number (NaN) result
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SYNOPSIS

9       #include <math.h>
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11       double infnan(int error);
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13       Link with -lm.
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DESCRIPTION

16       The infnan() function returns a suitable value for infinity and "not-a-
17       number" (NaN) results.  The value of error can be ERANGE  to  represent
18       infinity or anything else to represent NaN.  errno is also set.
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RETURN VALUE

21       If error is ERANGE (Infinity), HUGE_VAL is returned.
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23       If error is -ERANGE (-Infinity), -HUGE_VAL is returned.
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25       If error is anything else, NAN is returned.
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ERRORS

28       EDOM   The value of error is "not-a-number" (NaN).
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30       ERANGE The value of error is positive infinity or negative infinity.
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CONFORMING TO

33       4.3BSD.
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NOTES

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

40       This page is part of release 3.53 of the Linux  man-pages  project.   A
41       description  of  the project, and information about reporting bugs, can
42       be found at http://www.kernel.org/doc/man-pages/.
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46GNU                               1993-06-02                         INFNAN(3)