Webastor - Programming Tips and Tricks

Hi all, I would like to ask you a very urgent little problem to ask you, if mobile applications are written in java/swift/python, why it doesn't make sense to write webapplications for desktop browsers in these languages? Thank you very much for your help, please.

Hi, I have a big problem a little silly, i'm a post grad student i want to know what is better to adopt in my 6months industrial training? a languagephp or php or networking? Please answer me very quickly.