I would like to know how can I add the section symbol §, so that it will be displayed as follows.
§4 First section
§5 Second section
By default, it is generated as follows when a \section command is used.
4 First section
5 Second section
Edit:
This is one solution:
\renewcommand{\thesection}{\S\arabic{section}}
However, it adds § also with \subsection command. Is there another solution?

\subsections. – karlkoeller Aug 10 '13 at 19:59