What programming language is in highest demand?

Answer 1

https://www.forbes.com/sites/jeffkauflin/2017/05/12/the-five-most-in-demand-coding-languages/

Answer 2

In addition, I would ask, to do what? If you are a blank page and want to start from scratch to learn the most popular language, there is multiple point to keep in mind :
1| popular languages come and go. What is popular today might not be so popular in 5 years (when you will start to be really fluent with it)
2| different languages require different time to understand the whole ecosystem. Java compared to c++ might easier to understand the whole topics because the language have less concept and doesn't requires you to know a lot about linker/compiler/...
3| javascript is a pretty easy language to learn but the frameworks commonly used change every 10 minutes... so the time to get used to something, something new is trendy.
4| I go back to my first question depending on what you want to do, you will use different languages. If web is your thing then javascript on client (and eventually server) might be the way to go. If you want to create 3D engines for video games for example, then c++ is the main one. If you want to create mobile Game, then C# and Unity3D is very popular this days... and so on.