# How to let enumeration start at (0) automatically?

As we know the enumeration usually begin at (1), then followed by (2), (3),...

My question: How to start at (0)? I know \item[(0)] will work, but how do I do this automatically? That is, make it as a default option.

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With the enumitem package just say \setlist[enumerate,1]{start=0} –  egreg Mar 4 '13 at 14:36
@egreg Yes, it works, thank you. However, the second layer will start at () instead of (a)... –  Popopo Mar 4 '13 at 14:39
There is no zero'th letter, so \arabic* is the only format supporting zero –  daleif Mar 4 '13 at 14:52

I really don't know why one should want it. However, here's a solution with the enumitem package.

\documentclass{article}
\usepackage{enumitem}
\setlist[enumerate,1]{start=0} % only outer nesting level
\begin{document}
\begin{enumerate}
\item zero
\item one
\begin{enumerate}
\item a
\item b
\end{enumerate}
\item two
\end{enumerate}
\end{document}


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Thank you a lot. –  Popopo Mar 4 '13 at 15:04