These days, most languages provide an interactive shell, and Kotlin is no exception. If you want to quickly write some code that you won't use again, then the REPL is a good tool to have. Some people prefer to test their methods quickly, but you should always write unit tests rather than using the REPL to validate that the output is correct.
Note: REPL is the common name when referring to an interactive shell, and is an abbreviation for read, evaluate, print, loop.
You can start the REPL by adding dependencies to the classpath in order to make them available within the instance. To look at an example, we will use the Joda library to deal with the date and time. First, we need to download the JAR. In a Terminal window, use the following commands:
$ wget https://github.com/JodaOrg/joda-time/releases/download/v2.9.4/joda-time-2.9.4-dist.tar.gz $ tar xvf joda-time-2...
