\documentclass{article}
\usepackage{graphicx}
\usepackage{lipsum}
\begin{document}
Hello \LaTeX{}.

\section{Introduction}
\label{sec:intro}


\begin{figure}[htb]
  \centering
  \includegraphics
  \caption{Test}
\end{figure}
\end{document}

%%% Local Variables:
%%% mode: latex
%%% TeX-master: t
%%% End: