mpare the following three lines.</p>
<pre><code>    WHILE count &lt; 5
    WHILE 1
    WHILE 0
</code></pre>
<p>The first line contains a condition that might be true, or might be false. The remaining lines use an expression. WHILE 1 is <em>always</em> true and WHILE 0 is <em>always</em> false.</p>
<p>Using this you can create a loop that runs forever:</p>
<pre><code>    WHILE 1
        PRINT "Hello, world!"
    LOOP
    END
</code></pre>
<p>...or a loop that never runs:</p>
<pre><code>    WHILE 0
        P