Provided by: manpages-dev_3.35-0.1ubuntu1_all

**NAME**

lround, lroundf, lroundl, llround, llroundf, llroundl - round to nearest integer, away from zero

**SYNOPSIS**

#include<math.h>longintlround(doublex);longintlroundf(floatx);longintlroundl(longdoublex);longlongintllround(doublex);longlongintllroundf(floatx);longlongintllroundl(longdoublex);Link with-lm. Feature Test Macro Requirements for glibc (seefeature_test_macros(7)): All functions shown above: _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L; orcc-std=c99

**DESCRIPTION**

These functions round their argument to the nearest integer value, rounding away from zero, regardless of the current rounding direction (seefenv(3)). Note that unlikeround(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. Ifxis a NaN or an infinity, or the rounded value is too large to be stored in along(longlongin the case of thell*functions) then a domain error occurs, and the return value is unspecified.

**ERRORS**

Seemath_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 seterrno.

**VERSIONS**

These functions first appeared in glibc in version 2.1.

**CONFORMING** **TO**

C99, POSIX.1-2001.

**SEE** **ALSO**

ceil(3),floor(3),lrint(3),nearbyint(3),rint(3),round(3)

**COLOPHON**

This page is part of release 3.35 of the Linuxman-pagesproject. A description of the project, and information about reporting bugs, can be found at http://man7.org/linux/man- pages/. 2010-09-20 LROUND(3)