How do you install and configure Scala?

To install and configure Scala, you can follow these steps:

1. Download the Scala installation package by first visiting the official website of Scala (https://www.scala-lang.org/), and selecting the binary installation package suitable for your operating system. Typically, there are two options available: the Scala compiler and the Scala development toolkit (which includes the Scala compiler, standard library, and related tools).
2. To install Scala, after downloading it, follow the instructions provided in the installation package. For Windows users, the installation program will guide you through the process, and then you can add the directory of Scala’s executable files to the system’s environment variables. For Linux and Mac users, you can unpack the downloaded tar.gz file and move the unpacked directory to the location where you want to install Scala.
3. Set up Scala environment variables: To be able to use the Scala command from anywhere, you need to add the directory of Scala’s executable files to the system’s environment variables. On Windows, you can find the “Environment Variables” button in the “Advanced” tab of system properties, edit the “Path” variable in the “System Variables” section. On Linux and Mac, you can edit the .bashrc or .bash_profile file and add a line similar to the following content: export PATH=$PATH:/path/to/scala/bin.
4. To verify the installation, open the command line terminal and type the command “scala”. If everything is set up correctly, you will see the Scala interactive interpreter start and display the Scala version information.

After installing and setting up Scala, you are able to write and run programs using Scala.