Top programming language to lean in 2019
Python: Python is cross-platform programming language released in 1991 although it is an old language but still is in the list of competitors. It has wide range of applications in market and still growing in flowing fields such as data analytics, artificial Intelligence and numerical computations.
It is wildly used for web development by using some frameworks such as Django. It is lightweight and has beautiful restful and soap structure. It has wide range of libraries which are mostly freely available.
Mobile app development: yes, python can be used as native mobile app development.