[Tex/LaTex] Environment code undefined

Question

Why do I get ! LaTeX Error: Environment code undefined. when I use:

\documentclass[10pt,a4wide]{article}
\usepackage{a4wide}
\usepackage[utf8]{inputenc}
\usepackage[portuguese]{babel}
\usepackage{graphicx}
\newcommand{\HRule}{\rule{\linewidth}{0.5mm}}

\begin{document}
\begin{minipage}{7cm}  

\begin{code}  

module Dir where

import TeX
import Data.List

\end{code}

\end{minipage}\hfill
\begin{minipage}{7cm}

\begin{code}

module DirV where

import TeX
import Data.List

\end{code}

\end{minipage}

Answer 1

You don't have an environment called code. If you are trying to print code, you might be interested in the verbatim environment, or other pretty-printing environments/packages. See Print programs with its proper syntax.

Wrapping your code snippet into a minimal compiling document using verbatim, it produces the following output:

\documentclass{article}
\begin{document}
\begin{minipage}{7cm}%
\begin{verbatim}
module Dir where

import TeX
import Data.List
\end{verbatim}
\end{minipage}\hfill
\begin{minipage}{7cm}%
\begin{verbatim}
module DirV where

import TeX
import Data.List
\end{verbatim}
\end{minipage}
\end{document}