\begin{enumerate} \item First item \item Second item .... \end{enumerate}
The enumerate environment produces a numbered list. Enumerations can
be nested within one another, up to four levels deep. They can also
be nested within other paragraph-making environments. There must be at least one \item
command within the environment.
Each item of an enumerated list begins with an
\item
command. The optional label
argument of the \item
command, if given, suppresses incrementing
the counter. If not given the default labels are
taken from the counters, enumi, enumii, enumiii, enumiv
for the
four allowed levels of nesting, respectively.
The numbering style for the enumeration is determined by
the commands, \labelenumi
, \labelenumii
, etc., for
the nested levels. These may be redefined with the
\renewcommand
command.
For example, to use upper case letters for the first level and lower case letters for the second level of enumeration:
\renewcommand{\labelenumi}{\Alph{enumi}}
\renewcommand{\labelenumii}{\alph{enumii}}