Java, JavaScript and Python are invariably the three most popular programming languages in several indexes, but their exact order varies depending on how the ranking is calculated.

Python continues to shake Java from its spot as one of the top programming languages.

Java has a lot going for it, but it's not the top language for data science. Java professionals may want to familiarize themselves with Python or R for data science workflows.

For the first time in the history of TIOBE's index, Java has slipped out of the top two, leaving Python to occupy the spot behind reigning champion, C.

A big new developer survey shows that Python has finally passed Java in the programming language popularity wars, propelled by its propensity for use in machine learning and data science projects.