\begin{flushleft} This text is situated inside a \texttt{flushleft} 
environment. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do 
eiusmod tempor incididunt ut labore et dolore magna aliqua. \end{flushleft}

\begin{flushright} This text is situated inside a \texttt{flushright} 
environment. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do 
eiusmod tempor incididunt ut labore et dolore magna aliqua. \end{flushright}

\begin{center} This text is situated inside a \texttt{center} environment. 
Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor 
incididunt ut labore et dolore magna aliqua. \end{center}