What do I have to do to write mobile apps?

Answer 1

The official language for Android development is Java. Large parts of Android are written in Java and its APIs are designed to be called primarily from Java. That said, it is possible to develop C and C++ apps using the Android Native Development Kit (NDK), however it isn't something that Google promotes.

Answer 2

iOS applications written with Objective-C or swift programming languages,apple promote to use swift 3.in iOS like android you can use C and C++ for native development.

Answer 3

Thank you for the replies guys