LRINTSection: Linux Programmer's Manual (3)
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NAMElrint, 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)):
DESCRIPTIONThese 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 VALUEThese functions return the rounded integer value.
ERRORSSee 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.
VERSIONSThese functions first appeared in glibc in version 2.1.
CONFORMING TOC99, POSIX.1-2001.
SEE ALSOceil(3), floor(3), lround(3), nearbyint(3), rint(3), round(3)
COLOPHONThis page is part of release 3.21 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.