LRINT(3) manual page
Table of Contents
lrint, lrintf, lrintl, llrint, llrintf, llrintl
- round to nearest integer
#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 || _POSIX_C_SOURCE >= 200112L;
or cc -std=c99
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.
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.
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.
These functions first
appeared in glibc in version 2.1.
The
lrint(), lrintf(), lrintl(), llrint(), llrintf(), and llrintl() functions
are thread-safe.
C99, POSIX.1-2001.
ceil(3)
, floor(3)
,
lround(3)
, nearbyint(3)
, rint(3)
, round(3)
This page is part of
release 3.78 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 http://www.kernel.org/doc/man-pages/.
Table of Contents
![[Go to CFHT Home Page]](/images/cfht-icon.gif){kind=icon}
Man Pages 
Back to Software Index 
Manpage Top Level