\documentclass[a4paper,12pt]{article}
\begin{document}

% Here we see how to put headings 

\begin {center}
\bf\LARGE {Part Heading}
\end{center}

\section*{1.0  Section Heading}
\subsection*{1.1  Subsection Heading} 
The is the sample paragrah following it.  Note that this 
paragraph is not indented.  But the following paragraph
will be indented


The is the second paragraph.  For now
this is all I have to say.  Note that putting an 
* suppresses the automatic numbering.    
 

\end{document}