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.

Python has scaled to the top of the monthly PyPL language popularity index, overtaking Java. Also on the rise, in the rival Tiobe index, is Scala, which has again cracked the index’s Top 20.

If you have the skills, Go, Scala and Ruby are the programming languages most likely to get you job interviews, although JavaScript, Python and Java are the languages most used by developers.