\begin{Schunk}
\begin{Sinput}
 is.character(x)
\end{Sinput}
\begin{Soutput}
[1] TRUE
\end{Soutput}
\begin{Sinput}
 mode(x)
\end{Sinput}
\begin{Soutput}
[1] "character"
\end{Soutput}
\end{Schunk}
