I just have idea about creating app using java or c++ what are the fundamentals i should know ? Help me please . Or other lang

Question

App creation

Answer 1

Same as the sololearn cpp and java courses fundamentals!

Answer 2

Math operations,handling user input,pointers,arrays,classs, inheritance,exceptions,etc...

Answer 3

Outline sir tell something

Answer 4

In C++ you need to have a basic understanding of:
IO
Program flow
Functions
Pointers
Classes and objects
Inheritence
Exceptions

These are enough to get you through basic app programming.
I recommend you read the tutorial at cplusplus.com.it covers those concepts and more. For a more comprehensive look at C++, you should definetely read 'professional c++',its a long book that covers alot about c++.