To exit a Node.js application, you can use the process.exit() method. This method takes an optional exit code as a parameter and terminates the Node.js process.

Here's an example:
// Exit with code 0


// Exit with code 1

In the example above, process.exit(0) will exit the Node.js application with a successful status code, while process.exit(1) will exit with an error status code.

It's important to note that process.exit() should be used with caution, as it immediately terminates the Node.js process and may leave behind unfinished tasks or resources. It's generally recommended to gracefully shut down a Node.js application using a specific signal or event handler, or by waiting for all tasks to complete before exiting.