Restart section numbering after unnumbered chapter

Question

How can I make one chapter (Conclusion) without number?

I have tried this:

\documentclass{report}
\begin{document}
\tableofcontents

\chapter{Introduction}
\chapter{Chapter 1}  
\chapter*{Conclusion} 
\addcontentsline{toc}{chapter}{Conclusion}  
\end{document}

I have this

But I want:

1  Conclusion
2  Perspectives

not

5  Conclusion
6  Perspectives

Answer 1

\chapter* doesn't increment the chapter counter, which resets the section counter. It's easiest to just reset the section counter to 0:

\chapter*{Conclusion}
\addcontentsline{toc}{chapter}{Conclusion}
\setcounter{section}{0}