xref: /minix3/lib/libm/man/rint.3 (revision 0a6a1f1d05b60e214de2f05a7310ddd1f0e590e7)

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.\"     from: @(#)rint.3	5.1 (Berkeley) 5/2/91
.\"	$NetBSD: rint.3,v 1.15 2015/09/13 10:46:41 wiz Exp $
.\"
.Dd September 13, 2015
.Dt RINT 3
.Os
.Sh NAME
.Nm nearbyint ,
.Nm nearbyintf ,
.Nm nearbyintl ,
.Nm rint ,
.Nm rintf ,
.Nm rintl
.Nd round to integral value in floating-point format
.Sh LIBRARY
.Lb libm
.Sh SYNOPSIS
.In math.h
.Ft double
.Fn nearbyint "double x"
.Ft float
.Fn nearbyintf "float x"
.Ft long double
.Fn nearbyintl "long double x"
.Ft double
.Fn rint "double x"
.Ft float
.Fn rintf "float x"
.Ft long double
.Fn rintl "long double x"
.Sh DESCRIPTION
The
.Fn rint ,
.Fn rintf ,
and
.Fn rintl
functions return the integral value nearest to
.Fa x
according to the prevailing rounding mode.
These functions raise an inexact exception when the original argument
is not an exact integer.
.Pp
The
.Fn nearbyint ,
.Fn nearbyintf ,
and
.Fn nearbyintl
functions perform the same operation, except that they do not raise
an inexact exception.
.Sh SEE ALSO
.Xr abs 3 ,
.Xr ceil 3 ,
.Xr fabs 3 ,
.Xr fenv 3 ,
.Xr floor 3 ,
.Xr lrint 3 ,
.Xr math 3 ,
.Xr round 3
.Sh HISTORY
A
.Fn rint
function appeared in
.At v6 .