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.

Tiobe analysts believe that within three to four years' time, Python will "probably replace C and Java" to become the most popular programming language in the world.

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.

What just happened? For the first time in more than 20 years, the Python programming language has overtaken Java, JavaScript, and C as the most popular language.

Math, computer science teacher Firoza Rahman founded Coding Club for students interested in programming at Alexander Hamilton High School in Elmsford.

For the first time in two decades, Python beat Java to become the second-most popular programming language this month, according to the TIOBE Programming Community Index.