OpenDarwin 7.2.1 - man page for finite (opendarwin section 3)

FINITE(3)			   BSD Library Functions Manual 			FINITE(3)

NAME
     finite -- returns 1 for finite x, 0 for infinite x and NaNs.

SYNOPSIS
     #include <math.h>

     int
     finite(double x);

DESCRIPTION
     The finite() function returns 1 if -infinity < x < +infinity. It returns 0 if x is +-infin-
     ity or a NaN.

STANDARDS
     The finite() function conforms to ISO/IEC 9899:1999(E).

BSD					   July 2, 2003 				      BSD