FINITE(3) BSD Library Functions Manual FINITE(3)NAME
finite, finitef — tests for finite values
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
#include <math.h>
int
finite(double x);
int
finitef(float x);
DESCRIPTION
The finite() function returns the value 1 when
-∞ < x < +∞.
Otherwise a zero is returned (that is, |x| = ∞ or x is NaN).
SEE ALSOisfinite(3), math(3)STANDARDS
The described functions conform to IEEE Std 754-1985. Note that unlike
isfinite(3), neither function is present in the ISO C-language standards
or in the IEEE POSIX standards.
HISTORY
The finite and finitef() functions first appeared in 4.3BSD.
BSD July 28, 2011 BSD