1ISFINITE(P)                POSIX Programmer's Manual               ISFINITE(P)
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NAME

6       isfinite - test for finite value
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SYNOPSIS

9       #include <math.h>
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11       int isfinite(real-floating x);
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DESCRIPTION

15       The  isfinite() macro shall determine whether its argument has a finite
16       value (zero, subnormal, or normal, and not infinite or NaN). First,  an
17       argument  represented  in a format wider than its semantic type is con‐
18       verted to its semantic type. Then determination is based on the type of
19       the argument.
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RETURN VALUE

22       The  isfinite()  macro shall return a non-zero value if and only if its
23       argument has a finite value.
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ERRORS

26       No errors are defined.
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28       The following sections are informative.
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EXAMPLES

31       None.
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APPLICATION USAGE

34       None.
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RATIONALE

37       None.
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FUTURE DIRECTIONS

40       None.
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SEE ALSO

43       fpclassify() , isinf() , isnan() , isnormal() , signbit()  ,  the  Base
44       Definitions volume of IEEE Std 1003.1-2001 <math.h>
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47       Portions  of  this text are reprinted and reproduced in electronic form
48       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
49       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
50       Specifications Issue 6, Copyright (C) 2001-2003  by  the  Institute  of
51       Electrical  and  Electronics  Engineers, Inc and The Open Group. In the
52       event of any discrepancy between this version and the original IEEE and
53       The  Open Group Standard, the original IEEE and The Open Group Standard
54       is the referee document. The original Standard can be  obtained  online
55       at http://www.opengroup.org/unix/online.html .
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59IEEE/The Open Group                  2003                          ISFINITE(P)
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