{Complexity}

According to TIOBE, currently Java is the most popular language and C/ C++ are second, third placed.

They update top 20 languages every month, based on their rating method. And they use couple of webs searching engines to count on its resources like availability of skilled engineers, courses and third party vendors.

I think accuracy of this result is not important. It should be just for fun especially if you are the programmer who is using one of top 5. And personally I would like to suggest them that those programming languages should be categorized, because to compare Java with SAS or PL/SQL is not make sense. It’s just like comparing orange with apple.