LaTeX: Including Source Code in a LaTeX Document

Occasionally it is desired to have text printed literally in a LaTeX document, without any formatting. Source code is an example of text you might desire to print literally. To accomplish this, we wrap the literal text in {verbatim} tags as such:

\begin{verbatim}
   (insert literal text)
\end{verbatim}

Reference:

Kopka, Helmut. Daly, Patrick W.  "A Guide to LaTeX: Document Preparation
        for Beginners and Advanced Users"  Addison-Wesley Publishing Company.
        1993.  ISBN 0-201-56889-6.