tt>^</tt> stands for the control key, so
that <tt>^C</tt> means first press the key marked control and hold it down while pressing the C key.)
It is important for you to
know how to do this in case, for example, you begin a computation which is taking too long.
For example:

<pre>
(%i1)&nbsp;sum&nbsp;(1/x^2,&nbsp;x,&nbsp;1,&nbsp;100000)$
^C
Maxima&nbsp;encountered&nbsp;a&nbsp;Lisp&nbsp;error:

&nbsp;Interactive&nbsp;interrupt&nbsp;at&nbsp;#x7FFFF74A43C3.

Automatically&nbsp;continuing.
To&nbsp;enable&nbsp;t