====== Your First Node.js Application ======


==== Writing a Simple Hello World Script ====


Create a file ''app.js'' and add the following code:
<code>
console.log("Hello, Node.js!");
</code>


Run the script using:
<code>
node app.js
</code>

==== Using REPL (Read-Eval-Print Loop) ====


You can also execute JavaScript directly in the Node.js interactive shell:
<code>
node
> console.log("Hello, Node.js!");
</code>