\begin{knitrout}
\definecolor{shadecolor}{rgb}{0.969, 0.969, 0.969}\color{fgcolor}\begin{kframe}
\begin{alltt}
\hlnum{3} \hlopt{<} \hlnum{4}
\end{alltt}
\begin{verbatim}
## [1] TRUE
\end{verbatim}
\begin{alltt}
\hlnum{2} \hlopt{+} \hlnum{2} \hlopt{==} \hlnum{5}
\end{alltt}
\begin{verbatim}
## [1] FALSE
\end{verbatim}
\begin{alltt}
\hlstd{x} \hlkwb{<-} \hlnum{42}
\hlnum{5} \hlkwb{->} \hlstd{X}
\end{alltt}
\end{kframe}
\end{knitrout}