\begin{center}\Huge Dafny Reference Manual\end{center}
\begin{center}K. Rustan M. Leino, David R. Cok, and the Dafny contributors\end{center}
\begin{center}\today\end{center}
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\textbf{Abstract:} This is the Dafny reference manual; it describes the Dafny programming
language and how to use the Dafny verification system.
Parts of this manual are more tutorial in nature in order to help the
user understand how to do proofs with Dafny.

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\begin{center}\Large Acknowledgements\end{center}
Rustan Leino is the designer of the Dafny language and the chief implementor of the dafny tools. 
Leino began this document, with additions from Richard Ford, David R. Cok, and other members of the Dafny project.
Many others contributed to the implementation and to documenting various aspects of the language, 
as described on the project website at \url{https://github.com/dafny-lang/dafny}.
David R. Cok is the primary author and editor.
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