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



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

SYNOPSIS
       #include <math.h>

       long int lrint(double x);
       long int lrintf(float x);
       long int lrintl(long double x);

       long long int llrint(double x);
       long long int llrintf(float x);
       long long int 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).

       allbox; lbw30 lb lb  l  l  l.   Interface Attribute Value  T{  lrint(),
       lrintf(), lrintl(),
       llrint(), llrintf(), llrintl() T}   Thread safety  MT-Safe

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 4.16 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/.



                                  2017-09-15                          LRINT(3)