ed without the <code>-H have</code> or <code>-W want</code> options,
the program will print the prompt
</p>
<div class="example">
<pre class="example">You have: 
</pre></div>

<p>At this point you can exit the program by entering the end-of-file character
(usually control-D) or continue by entering either a value or a unit.
(a value comprises a numerical value and a unit.
For example, 
</p>
<div class="example">
<pre class="example">You have: 80 km/h
You want: 
</pre></div>

<p>At this point, if you enter a