RINT "Hello, world!"
    LOOP
    END
</code></pre>
<p>DO loops can also use an expression rather than a condition. Once again, UNTIL 1 is <em>always</em> true and UNTIL 0 is <em>always</em> false.</p>
<p>This loop runs forever:</p>
<pre><code>    DO
        PRINT "Hello, world!"
    UNTIL 0
    END
</code></pre>
<p>...but this loop runs exactly once:</p>
<pre><code>    DO
        PRINT "Hello, world!"
    UNTIL 1
    END
</code></pre>
<p>You can use any numeric or string value in your WHILE and UNTIL state