NAME
lrint, lrintf, lrintl, llrint, llrintf, llrintl - round to nearest integer
SYNOPSIS
#include <math.h>
long
lrint(double x);
long lrintf(float x);
long lrintl(long double x);
long long
llrint(double x);
long long llrintf(float x);
long long llrintl(long double x);
Link with -lm.
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
All functions shown above:
_ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
DESCRIPTION
These functions round their argument to the nearest integer value, using the current rounding direction (see fesetround(3)).
Note that unlike the rint(3) family of functions, 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: x is 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.
VERSIONS
These functions first appeared in glibc in version 2.1.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
CONFORMING TO
C99, POSIX.1-2001, POSIX.1-2008.
SEE ALSO
ceil(3), floor(3), lround(3), nearbyint(3), rint(3), round(3)
COLOPHON
This page is part of release 5.09 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.