Each Node.js process has a set of built-in functionality, accessible through the global process module. The process module need not to be required - it is somewhat literally a wrapper around the currently executing process, and many of the methods it exposes are actually wrappers around calls into some of Nodejs core C libraries.
process.stdout.write("hello world")The simplest way of retrieving arguments in Nodejs is via the process.argv array. This is a global object that you can use without
importing any additional libraries to use it. You simply need to pass arguments to a Node.js application, just like we showed earlier,
and these arguments can be accessed within the application via the process.argv array.