isfinite(3M) Mathematical Library Functions isfinite(3M)NAMEisfinite - test for finite value
SYNOPSIS
c99 [ flag... ] file... -lm [ library... ]
#include <math.h>
int isfinite(real-floating x);
DESCRIPTION
The isfinite() macro determines whether its argument has a finite value
(zero, subnormal, or normal, and not infinite or NaN). First, an argu‐
ment represented in a format wider than its semantic type is converted
to its semantic type. Then determination is based on the type of the
argument.
RETURN VALUES
The isfinite() macro returns a non-zero value if and only if its argu‐
ment has a finite value.
ERRORS
No errors are defined.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Standard │
├─────────────────────────────┼─────────────────────────────┤
│MT-Level │MT-Safe │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOfpclassify(3M), isinf(3M), isnan(3M), isnormal(3M), math.h(3HEAD),
signbit(3M), attributes(5), standards(5)SunOS 5.11 12 Jul 2006 isfinite(3M)