FINITE(3) BSD Programmer's Manual FINITE(3)

## NAME

**finite**, **finitef** - tests for finite values

## LIBRARY

libm

## SYNOPSIS

**#include <math.h>**
*int*
**finite**(*double x*);
*int*
**finitef**(*float x*);

## DESCRIPTION

The **finite**() function returns the value 1 when
-Infinity < *x* < +Infinity.
Otherwise a zero is returned (that is, |*x*| = Infinity or *x* is *NaN*).

## SEE ALSO

isfinite(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.
MirOS BSD #10-current July 28, 2011 1

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