mdzsyn-string">"Hello, world!"</span>)</code></pre><p>Put the following code in a file named <code class="mendoza-code">hello.janet</code>, and run <code class="mendoza-code">janet
hello.janet</code>.  The words "Hello, world!" should be printed to the console, and
then the program should immediately exit. You now have a working Janet program!
</p>
<p>Alternatively, run the program <code class="mendoza-code">janet</code> without any arguments to enter a
REPL, or read-eval-print-loop. This is a mode where Ja