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

6       lrint,  lrintf, lrintl, llrint, llrintf, llrintl - round to nearest in‐
7       teger
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SYNOPSIS

10       #include <math.h>
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12       long lrint(double x);
13       long lrintf(float x);
14       long lrintl(long double x);
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16       long long llrint(double x);
17       long long llrintf(float x);
18       long long 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:
25           _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
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DESCRIPTION

28       These functions round their argument to the nearest integer value,  us‐
29       ing the current rounding direction (see fesetround(3)).
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31       Note  that  unlike  the rint(3) family of functions, the return type of
32       these functions differs 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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ATTRIBUTES

56       For  an  explanation  of  the  terms  used  in  this  section,  see at‐
57       tributes(7).
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59       ┌────────────────────────────────────────────┬───────────────┬─────────┐
60       │Interface                                   │ Attribute     │ Value   │
61       ├────────────────────────────────────────────┼───────────────┼─────────┤
62       │lrint(), lrintf(), lrintl(), llrint(),      │ Thread safety │ MT-Safe │
63       │llrintf(), llrintl()                        │               │         │
64       └────────────────────────────────────────────┴───────────────┴─────────┘
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CONFORMING TO

67       C99, POSIX.1-2001, POSIX.1-2008.
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SEE ALSO

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

73       This  page  is  part of release 5.13 of the Linux man-pages project.  A
74       description of the project, information about reporting bugs,  and  the
75       latest     version     of     this    page,    can    be    found    at
76       https://www.kernel.org/doc/man-pages/.
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80                                  2021-03-22                          LRINT(3)
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