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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: _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE; or cc -std=c99

DESCRIPTION
       These  functions  round  their argument to the nearest integer value, using the current rounding direction (see
       fesetround(3)).

       Note that unlike rint(3), etc., 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 func-
       tions.

       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.

CONFORMING TO
       C99, POSIX.1-2001.

SEE ALSO
       ceil(3), floor(3), lround(3), nearbyint(3), rint(3), round(3)

COLOPHON
       This page is part of release 3.22 of the Linux man-pages project.  A description of the project,  and  informa-
       tion about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.



                                  2008-08-11                          LRINT(3)