RINT(3M) Mathematical Library Functions RINT(3M)
NAME
rint, rintf, rintl - round-to-nearest integral value
SYNOPSIS
c99 [
flag... ]
file...
-lm [
library... ]
#include <math.h>
double rint(
double x);
float rintf(
float x);
long double rintl(
long double x);
DESCRIPTION
These functions return the integral value (represented as a
double)
nearest
x in the direction of the current rounding mode.
If the current rounding mode rounds toward negative infinity,
rint() is equivalent to
floor(3M). If the current rounding mode rounds
toward positive infinity,
rint() is equivalent to
ceil(3M).
These functions differ from the
nearbyint(3M),
nearbyintf(), and
nearbyintl() functions only in that they might raise the inexact
floating-point exception if the result differs in value from the
argument.
RETURN VALUES
Upon successful completion, these functions return the integer
(represented as a double precision number) nearest
x in the direction
of the current rounding mode.
If
x is NaN, a NaN is returned.
If
x is +-0 or +-Inf,
x is returned.
ATTRIBUTES
See
attributes(7) for descriptions of the following attributes:
+----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+----------------------------+-----------------------------+
|Interface Stability | Standard |
+----------------------------+-----------------------------+
|MT-Level | MT-Safe |
+----------------------------+-----------------------------+
SEE ALSO
abs(3C),
math.h(3HEAD),
ceil(3M),
feclearexcept(3M),
fetestexcept(3M),
floor(3M),
isnan(3M),
nearbyint(3M),
attributes(7),
standards(7)SunOS 5.11 July 12, 2006 RINT(3M)
