</pre>
:In case that the variable ''choice'' won't fullfil the condition (in a range between line 0 and 65535) the next instruction will be executed (here: Line 40). If "choice" is smaller than 0 an error will occur.
==== <code>ON SQ(x) GOSUB ln x1, x2, x3, x4, ...</code> ====
==== <code>OPENIN "datafile"</code> ====