%% 
%%  A DANTE-Edition example
%% 
%%  Example 02-27-1 on page 108.
%% 
%%  Copyright (C) 2010 Herbert Voss
%% 
%%  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.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{177.70511pt}
\setlength\parindent{0pt}
\usepackage[utf8]{inputenc}

\usepackage{polytable}

\begin{document}
\begin{pboxed}
\column{A}{l}\column{B}{l}\column{C}{l}\column{D}{l}
\={A} function
  \>[B] \textbf{fact(n: integer)}: integer;\\
  \>[B] begin \>[C]\qquad \>[D]\qquad\\
    \={C} if $n>1$ then \\
      \={D} fact:= n * fact(n-1) \\
    \>[C] else \\ \>[D] fact:= 1; \\ \>[B] end;
\end{pboxed}
\end{document}
