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RINT(3) FreeBSD Library Functions Manual RINT(3)
NAME
nearbyint, nearbyintf, nearbyintl, rint, rintf, rintl - round to integral
value in floating-point format
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
#include <math.h>
double
nearbyint(double x);
float
nearbyintf(float x);
long double
nearbyintl(long double x);
double
rint(double x);
float
rintf(float x);
long double
rintl(long double x);
DESCRIPTION
The rint(), rintf(), and rintl() functions return the integral value
nearest to x according to the prevailing rounding mode. These functions
raise an inexact exception when the original argument is not an exact
integer.
The nearbyint(), nearbyintf(), and nearbyintl() functions perform the
same operation, except that they do not raise an inexact exception.
SEE ALSO
abs(3), ceil(3), fabs(3), fenv(3), floor(3), ieee(3), lrint(3),
lround(3), math(3), round(3)
STANDARDS
These functions conform to ISO/IEC 9899:1999 ("ISO C99").
HISTORY
A rint() function appeared in Version 6 AT&T UNIX. The nearbyint() and
nearbyintf() functions appeared in FreeBSD 5.3, and the long double
variants were first available in FreeBSD 8.0.
FreeBSD 14.0-RELEASE-p6 January 13, 2008 FreeBSD 14.0-RELEASE-p6