\label{Spreadsheet_Referencing_Cells}
\textbf{Cells}
Cells may be specified by simply writing their name enclosed in either single quotes or double quotes.
For instance, \texttt{`A17'} and \texttt{"A17"} will be
replaced with the value in row $A$ column 17 before the Perl command is evaluated.
\noindent
\textbf{Ranges}
Ranges \index{ranges, spreadsheet} specify rectangles of various shapes
in the spreadsheet, just as ranges do in traditional spreadsheets.
Ranges must be enclosed in quotes. Examples of legitimate ranges:
\begin{itemize}
\item \texttt{`*'} - all rows, all columns
\item \texttt{`B*'} - all rows in column B
\item \texttt{`*5'} - all columns in row 5
\item \texttt{`C5'..`F25'} - all cells in the rectangle between C5 and F25
\end{itemize}
Many functions accept ranges, see \textbf{Special Functions} (\ref{Spreadsheet_Functions}). For example, \texttt{\&SUM(`d*')} will add up all cells in column $d$.
\noindent
\textbf{Special References}
There is an additional means of referencing cells most used in the
\textbf{template row} (\ref{Spreadsheet_Template_Row}).
By using a `\#' in the place of a row number
the spreadsheet will replace the \# with the current row number. For example
\texttt{`B\#'} will be replaced with the contents of cell $B7$ in the row 7 and
the contents of $B8$ in row 8.
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