NAME
round() — round function
SYNOPSIS
#include <math.h>
double round(double x);
DESCRIPTION
round()
rounds its argument to the nearest integral value in floating-point format.
An argument exactly halfway between two integers is rounded away from
zero, regardless of the current rounding direction.
Rounding away from zero also applies to the functions,
lroundand
llround.
The ISO/ANSI C committee has approved the
round()
function for inclusion in the C9X draft standard.
To use this function, compile either with the default
-Ae
option or with the
-Aa
and
-D_HPUX_SOURCE
options. Make sure your program includes
<math.h>.
Link in the math library by specifying
-lm
on the compiler or linker command line.
RETURN VALUE
The
round()
function returns the rounded integral value.
ERRORS
No errors are defined.
SEE ALSO
ceil(3M),
floor(3M),
fabs(3M),
fmod(3M),
fegetround(3M),
fesetround(3M),
lrint(3M),
llrint(3M),
lround(3M),
llround(3M),
rint(3M),
trunc(3M),
math(5),
fenv(5).
