Scala REPL

There is more than one way of interacting with Scala. One of them is using Scala Interpreter (REPL). To run Scala REPL using SBT, just give the following command in the command prompt/terminal:

sbt console

This command will run Scala REPL.

To run Scala REPL using Scala binary, perform the following:

1. Go to https://www.scala-lang.org/download/.
2. Download the latest Scala archive.
3. Extract the archive to any directory.
4. Set the directory path as environment variables as shown in https://www.scala-lang.org/download/install.html.
5. Try running the scala command, it should look something like this:

If so, congrats. You've done it. Now it's asking you to type any expression. You may try typing any expression. Try anything, like 1 + 2 or 1 + "2". REPL is your playground to learn Scala.