how to start latex document code example

Example 1: basic latex document

\documentclass{article}
\begin{document}
  Hello World!
\end{document}

Example 2: basic latex document

\documentclass{article}

\title{My first document}
\date{2013-09-01}
\author{John Doe}

\begin{document}
  \maketitle
  \newpage

  Hello World!
\end{document}