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 Copyright (c) 2005 David Schultz <das (at] FreeBSD.org>
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$FreeBSD: src/lib/msun/man/lround.3,v 1.4 2005/06/15 19:04:04 ru Exp $

.Dd April 7, 2005 .Dt LROUND 3 .Os .Sh NAME .Nm llround , .Nm llroundf , .Nm llroundl , .Nm lround , .Nm lroundf , .Nm lroundl .Nd "convert to nearest integral value" .Sh LIBRARY .Lb libm .Sh SYNOPSIS n math.h .Ft "long long" .Fn llround "double x" .Ft "long long" .Fn llroundf "float x" .Ft "long long" .Fn llroundl "long double x" .Ft long .Fn lround "double x" .Ft long .Fn lroundf "float x" .Ft long .Fn lroundl "long double x" .Sh DESCRIPTION The .Fn lround function returns the integer nearest to its argument .Fa x , rounding away from zero in halfway cases. If the rounded result is too large to be represented as a .Vt long value, an invalid exception is raised and the return value is undefined. Otherwise, if .Fa x is not an integer, .Fn lround may raise an inexact exception. When the rounded result is representable as a .Vt long , the expression .Fn lround x is equivalent to

o Vt long Pc Ns Fn round x (although the former may be more efficient).

p The .Fn llround , .Fn llroundf , .Fn llroundl , .Fn lroundf and .Fn lroundl functions differ from .Fn lround only in their input and output types. .Sh SEE ALSO .Xr lrint 3 , .Xr math 3 , .Xr rint 3 , .Xr round 3 .Sh STANDARDS The .Fn llround , .Fn llroundf , .Fn llroundl , .Fn lround , .Fn lroundf , and .Fn lroundl functions conform to .St -isoC-99 . .Sh HISTORY The .Vt float and .Vt double versions of these routines first appeared in .Fx 5.4 . The .Vt "long double" versions appeared in .Fx 6.0 .