\Header{prod}{Product of Vector Elements}
\keyword{arith}{prod}
\begin{Description}\relax
\code{prod} returns the product of all the values
present in its arguments.
\end{Description}
\begin{Usage}
\begin{verbatim}
prod(..., 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}
\begin{Details}\relax
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.

This is a generic function: methods can be defined for it
directly or via the \code{\Link{Summary}} group generic.
\end{Details}
\begin{References}\relax
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988)
\emph{The New S Language}.
Wadsworth \& Brooks/Cole.
\end{References}
\begin{SeeAlso}\relax
\code{\Link{sum}},
\code{\Link{cumprod}},
\code{\Link{cumsum}}.
\end{SeeAlso}
\begin{Examples}
\begin{ExampleCode}
print(prod(1:7)) == print(gamma(8))
\end{ExampleCode}
\end{Examples}

