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\name{Primitive}
\alias{.Primitive}
\alias{primitive}
\title{Call a ``Primitive'' Internal Function}
\description{
  \code{.Primitive} returns an entry point to a \dQuote{primitive}
  (internally implemented) function.
}
\usage{
.Primitive(name)
}
\arguments{
  \item{name}{name of the \R function.}
}
\details{
  The advantage of \code{.Primitive} over \code{\link{.Internal}}
  functions is the potential efficiency of argument passing.  However,
  this is done by ignoring argument names and using positional matching
  of arguments, so this is discouraged for functions of more than one
  argument.

  All primitve functions are in the base name space.
}
\seealso{
  \code{\link{.Internal}}.
}
\examples{
mysqrt <- .Primitive("sqrt")
c
.Internal # this one *must* be primitive!
get("if") # just 'if' or 'print(if)' are not syntactically ok.
}
\keyword{interface}