Name
lround, lroundf, lroundl, llround, llroundf, llroundl — round to nearest integer, away from zero
Synopsis
#include <math.h>
long int
lround( |
double x); |
long int
lroundf( |
float x); |
long int
lroundl( |
long double x); |
long long int
llround( |
double x); |
long long int
llroundf( |
float x); |
long long int
llroundl( |
long double x); |
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DESCRIPTION
These functions round their argument to the nearest integer value, rounding away from zero, regardless of the current rounding direction (see fenv(3)).
Note that unlike round(3), ceil(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 functions.
The following errors can occur:
- Domain error:
xis 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.