rint(3) BSD Library Functions Manual rint(3)
NAME
rint, lrint, llrint -- round to integral value
SYNOPSIS
#include <math.h>
double
rint(double x);
long double
rintl(long double x);
float
rintf(float x);
long int
lrint(double x);
long int
lrintl(long double x);
long int
lrintf(float x);
long long int
llrint(double x);
long long int
llrintl(long double x);
long long int
llrintf(float x);
DESCRIPTION
The rint() functions return the integral value nearest to x (according to
the prevailing rounding mode) in floating-point format.
The lrint() and llrint() functions return the integral value nearest to x
(according to the prevailing rounding mode) in the return formats speci-
fied. If the rounded value is outside the range of the return type, the
numeric result is unspecified and the "invalid" floating-point exception
is raised. A range error may occur if the magnitude of x is too large.
SPECIAL VALUES
rint(+-0) returns +-0 for all rounding modes.
rint(+-infinity) returns +-infinity for all rounding modes.
All these functions raise the "inexact" floating-point exception if the
result differs in value from the argument (except when they raise some
other floating-point exception, such as "invalid").
NOTE
The rinttol() function is deprecated. Please use the C99 function
lrint() instead.
SEE ALSO
abs(3), fabs(3), ceil(3), floor(3), math(3)
STANDARDS
The rint() , lrint() , and llrint() functions conform to ISO/IEC
9899:1999(E).
BSD July 02, 2008 BSD
Mac OS X 10.6 - Generated Thu Sep 17 20:22:36 CDT 2009