lrint

LRINT(3)                   Linux Programmer's Manual                  LRINT(3)

NAME
       lrint,  lrintf, lrintl, llrint, llrintf, llrintl - round to nearest in-
       teger

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,  us-
       ing 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 at-
       tributes(7).

       +-------------------------------+---------------+---------+
       |Interface                      | Attribute     | Value   |
       +-------------------------------+---------------+---------+
       |lrint(), lrintf(), lrintl(),   | Thread safety | MT-Safe |
       |llrint(), llrintf(), llrintl() |               |         |
       +-------------------------------+---------------+---------+
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 5.10 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/.

                                  2020-11-01                          LRINT(3)