\begin{lstlisting}
10 DEFUN FAC(N)=IF N==0 THEN 1 ELSE N*FAC(N-1)
20 FOR K=1 TO 6
30 PRINT FAC(K)
40 NEXT
\end{lstlisting}

\begin{lstlisting}
10 DEFUN FAC(N)=IF N==0 THEN 1 ELSE N*FAC(N-1)
20 K=MAP FAC, 1 TO 10
30 PRINT K
\end{lstlisting}

\begin{lstlisting}
10 DEFUN FIB(N)=IF N==0 THEN 0 ELSE IF N==1 THEN 1 ELSE FIB(N-1)+FIB(N-2)
20 FOR K=1 TO 12
30 PRINT FIB(K);" ";
40 NEXT
\end{lstlisting}