'Hello, World!' Walkthrough
The very first thing most developers learns about a new language is, usually, how to say "Hello, World!" in it. The reasons for that are mostly historic, but also because output is the most important part of a program, whether it's written output, visual output or any other form of output. It's what tells the user "hey, this is working and here's the result" or "something went wrong, here's what you can do to improve".
'Hello, World!' on the CLI Walkthrough
It's recommended to follow the 'Hello, World!' walkthrough first if you're planning on using RSML programmatically via its APIs or native exports.