The
lround()
function returns the integer nearest to its argument
x,
rounding away from zero in halfway cases.
If the rounded result is too large to be represented as a
long
value, an invalid exception is raised and the return value is undefined.
Otherwise, if
x
is not an integer,
lround()
may raise an inexact exception.
When the rounded result is representable as a
long,
the expression
lround(x)
is equivalent to
(
long )round(x)
(although the former may be more efficient).
The
llround(),
llroundf(),
llroundl(),
lroundf()
and
lroundl()
functions differ from
lround()
only in their input and output types.
