Paren
From base v3.3
by Rcore Rcore@Rproject.org
Parentheses and Braces
Open parenthesis, (
, and open brace, {
, are
.Primitive
functions in R.
Effectively, (
is semantically equivalent to the identity
function(x) x
, whereas {
is slightly more interesting,
see examples.
 Keywords
 programming
Usage
( ... )
{ ... }
Value

For (, the result of evaluating the argument. This has
visibility set, so will autoprint if used at toplevel.For {, the result of the last expression evaluated. This has
the visibility of the last evaluation.
References
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.
See Also
if
, return
, etc for other objects used in
the R language itself.
Syntax
for operator precedence.
Examples
library(base)
f < get("(")
e < expression(3 + 2 * 4)
identical(f(e), e)
do < get("\{")
do(x < 3, y < 2*x3, 6xy); x; y
## note the differences
(2+3)
{2+3; 4+5}
(invisible(2+3))
{invisible(2+3)}