Paren

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.

Syntax

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<code>( \dots )</code><p></p><p><code>{ \dots }</code></p>

Return Value

For (, the result of evaluating the argument. This has visibility set, so will auto-print if used at top-level. For {, the result of the last expression evaluated. This has the visibility of the last evaluation.

Examples

Example

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# NOT RUN {
f <- get("(")
e <- expression(3 + 2 * 4)
identical(f(e), e)

do <- get("\{")
do(x <- 3, y <- 2*x-3, 6-x-y); x; y

## note the differences
(2+3)
{2+3; 4+5}
(invisible(2+3))
{invisible(2+3)}
# }

See Also

if return etc for other objects used in the R language itself. Syntax for operator precedence.