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\name{is.symbol}
\alias{is.symbol}
\title{Is an Object of Type Symbol?}
\usage{is.symbol(x)}
\description{Checks whether its argument is a symbol.}
\arguments{
  \item{x}{an \R object.}
}
\value{\code{TRUE} if \code{x} is of type ``symbol'', and \code{FALSE}
  otherwise.
}
\keyword{programming}