Name
lround, lroundf, lroundl, llround, llroundf, llroundl — round to nearest integer, away from zero
Synopsis
#include <math.h>
long int lround( |
double x); |
long int lroundf( |
float x); |
long int lroundl( |
long double x); |
long long int llround( |
double x); |
long long int llroundf( |
float x); |
long long int llroundl( |
long double x); |
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DESCRIPTION
These functions round their argument to the nearest integer value, rounding away from zero, regardless of the current rounding direction (see fenv(3)).
Note that unlike round(3), ceil(3), etc., the return type of these functions differs from that of their arguments.
RETURN VALUE
These functions return the rounded integer value.
If x is a NaN or
an infinity, or the rounded value is too large to be stored
in a long (long
long in the case of the ll* functions) then a domain error occurs,
and the return value is unspecified.
ERRORS
See math_error(7) for information on how to determine whether an error has occurred when calling these functions.
The following errors can occur:
- Domain error:
xis a NaN or infinite, or the rounded value is too large -
An invalid floating-point exception (
FE_INVALID) is raised.
These functions do not set errno.
COLOPHON
This page is part of release 3.24 of the Linux man-pages project. A
description of the project, and information about reporting
bugs, can be found at
http://www.kernel.org/doc/man-pages/.
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Copyright 2001 Andries Brouwer <aebcwi.nl>. and Copyright 2008, Linux Foundation, written by Michael Kerrisk <mtk.manpagesgmail.com> Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies. Permission is granted to copy and distribute modified versions of this manual under the conditions for verbatim copying, provided that the entire resulting derived work is distributed under the terms of a permission notice identical to this one. Since the Linux kernel and libraries are constantly changing, this manual page may be incorrect or out-of-date. The author(s) assume no responsibility for errors or omissions, or for damages resulting from the use of the information contained herein. The author(s) may not have taken the same level of care in the production of this manual, which is licensed free of charge, as they might when working professionally. Formatted or processed versions of this manual, if unaccompanied by the source, must acknowledge the copyright and authors of this work. |