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%%
%% The LaTeX Companion, 2ed (second printing August 2004)
%%
%% Example A-3-1 on page 871.
%%
%% Copyright (C) 2004 Frank Mittelbach, Michel Goossens,
%% Johannes Braams, David Carlisle, and Chris Rowley
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3
%% of this license or (at your option) any later version.
%%
%% See http://www.latex-project.org/lppl.txt for details.
%%
\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{135.0pt}
\StartShownPreambleCommands
\usepackage{calc} \newcounter{local}
\setcounter{local}{2} % initial setting for the example
\StopShownPreambleCommands
\begin{document}
The value is currently ``\thelocal''.\\
\setcounter{local}{\value{local}+5}
The value has now changed to ``\thelocal''.
\end{document}
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