The course covers Scala 3, and it mentions the differences with Scala 2. Scala is an expressive, versatile, and safe programming language.

A number of languages, especially functional programming languages, are waiting in the wings to be the next great C# or Java replacement— or at least an alternative. One of these is called Scala.

Frege serves as another functional language option on the JVM alongside Scala, Clojure, and now Java itself, thanks to Java 8’s adoption of lambda capabilities earlier this year.