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LROUND(3) | Linux Programmer's Manual | LROUND(3) |
NAME¶
lround, lroundf, lroundl, llround, llroundf, llroundl - round to nearest integer, away from zeroSYNOPSIS¶
#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);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
_XOPEN_SOURCE >= 600 ||
_ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L;
or cc -std=c99
DESCRIPTION¶
These functions round their argument to the nearest integer value, rounding away from zero, regardless of the current rounding direction (see fenv(3)).RETURN VALUE¶
These functions return the rounded integer value.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: x is a NaN or infinite, or the rounded value is too large
- An invalid floating-point exception (FE_INVALID) is raised.
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 3.44 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/.2010-09-20 |