FINITE(3)

FINITE(3) | 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
-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.

July 28, 2011 | NetBSD 10.1