Scala CLI is a command-line tool to interact with the Scala language. It lets you compile, run, test, and package your Scala code. (and more!) It shares some similarities with build tools, but it doesn't aim at supporting multi-module projects, nor to be extended via a task system.
As of Scala 3.5.0, Scala CLI has become the official scala runner of the language (for more information
refer to SIP-46). For more details on using Scala CLI
via the scala command, refer to this doc.