1LRINT(3)                   Linux Programmer's Manual                  LRINT(3)
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NAME

6       lrint,  lrintf,  lrintl,  llrint,  llrintf,  llrintl - round to nearest
7       integer
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SYNOPSIS

10       #include <math.h>
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12       long int lrint(double x);
13       long int lrintf(float x);
14       long int lrintl(long double x);
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16       long long int llrint(double x);
17       long long int llrintf(float x);
18       long long int llrintl(long double x);
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20       Link with -lm.
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22   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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24       All functions shown above: _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE; or
25       cc -std=c99
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DESCRIPTION

28       These  functions  round  their  argument  to the nearest integer value,
29       using the current rounding direction (see fesetround(3)).
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31       Note that unlike rint(3), etc., the return type of these functions dif‐
32       fers from that of their arguments.
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RETURN VALUE

35       These functions return the rounded integer value.
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37       If  x  is a NaN or an infinity, or the rounded value is too large to be
38       stored in a long (long long in the case of the ll*  functions)  then  a
39       domain error occurs, and the return value is unspecified.
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ERRORS

42       See  math_error(7) for information on how to determine whether an error
43       has occurred when calling these functions.
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45       The following errors can occur:
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47       Domain error: x is a NaN or infinite, or the rounded value is too large
48              An invalid floating-point exception (FE_INVALID) is raised.
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50       These functions do not set errno.
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VERSIONS

53       These functions first appeared in glibc in version 2.1.
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CONFORMING TO

56       C99, POSIX.1-2001.
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SEE ALSO

59       ceil(3), floor(3), lround(3), nearbyint(3), rint(3), round(3)
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COLOPHON

62       This page is part of release 3.25 of the Linux  man-pages  project.   A
63       description  of  the project, and information about reporting bugs, can
64       be found at http://www.kernel.org/doc/man-pages/.
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68                                  2008-08-11                          LRINT(3)
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