LaTeX Table spacing example

%\title{LaTeX Table spacing example}  
% Example by John Hammersley

\documentclass{article}
\usepackage[usenames,dvipsnames]{xcolor}
\begin{document}

\section*{Table with default spacings}

% A table with the default row and column spacings
\begin{tabular}{ c c c }
First Row & -6 & -5 \\
Second Row & 4 & 10\\
Third Row & 20 & 30\\
Fourth Row & 100 & -30\\
\end{tabular}

\section*{Table with adjusted spacings}

% A table with adjusted row and column spacings
% \setlength sets the horizontal (column) spacing
% \arraystretch sets the vertical (row) spacing
\begingroup
\setlength{\tabcolsep}{10pt} % Default value: 6pt
\renewcommand{\arraystretch}{1.5} % Default value: 1
\begin{tabular}{ c c c }
First Row & -6 & -5 \\
Second Row & 4 & 10\\
Third Row & 20 & 30\\
Fourth Row & 100 & -30\\
\end{tabular}
\endgroup
% The \begingroup ... \endgroup pair ensures the separation
% parameters only affect this particular table, and not any
% sebsequent ones in the document.

\end{document}