\begin{figure}[placement]
  body of the figure
 \caption{figure title}
 \end{figure}
 Figures  are objects  that are not part  of the normal  text,  and are
 usually  "floated"  to a convenient  place,  like  the top  of a page.
 Figures will not be split between two pages.
The optional argument [placement] determines where LaTeX will try to place your figure. There are four places where LaTeX can possibly put a float:
The body of the figure is made up of whatever text, LaTeX commands, etc., you wish. The \caption command allows you to title your figure.