\Header{sum}{Sum of Vector Elements}
\keyword{arith}{sum}
\begin{Description}\relax
\code{sum} returns the sum of all the values
present in its arguments.
If \code{na.rm} is \code{FALSE} an \code{NA}
value in any of the arguments will cause
a value of \code{NA} to be returned, otherwise
\code{NA} values are ignored.\end{Description}
\begin{Usage}
\begin{verbatim}
sum(..., na.rm=FALSE)
\end{verbatim}
\end{Usage}
\begin{Arguments}
\begin{ldescription}
\item[\code{...}] numeric vectors.
\item[\code{na.rm}] logical. Should missing values be removed?
\end{ldescription}
\end{Arguments}

