Fancy page number in Latex

In the preambule:

\usepackage{fancyhdr}
\pagestyle{fancy}
\renewcommand{\headrulewidth}{0.0pt}
\fancyhead{}
\fancyfoot[CF]{\thesection - \thepage}

Then reset page number to `1' for each new section:

\newpage
\section{Introduction}
\pagenumbering{arabic}