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ISINF(3)		   Linux Programmer's Manual		      ISINF(3)

NAME
       isinf, isnan, finite - test for infinity	or not-a-number	(NaN)

SYNOPSIS
       #include	<math.h>

       int isinf(double	value);

       int isnan(double	value);

       int finite(double value);

DESCRIPTION
       The  isinf() function returns -1	if value represents negative infinity,
       1 if value represents positive infinity,	and 0 otherwise.

       The isnan() function returns a non-zero value if	value  is  "not-a-num-
       ber" (NaN), and 0 otherwise.

       The  finite()  function	returns	 a  non-zero value if value is neither
       infinite	nor a "not-a-number" (NaN) value, and 0	otherwise.

CONFORMING TO
       BSD 4.3

GNU				  1993-06-02			      ISINF(3)

NAME | SYNOPSIS | DESCRIPTION | CONFORMING TO

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