What is the main thing you should focus on c language

Question

I really want to know that

Answer 1

In my opinion you should focus on functional programming. Learn how to build and call functions ( with or without parameters) will help you understand better the differences between call by reference and call by value. Don't forget to have a basic but solid understanding of what the stack and the heap are. They are going to be very important in the future if you are switching to an OOP(Object Orientent Programming) -Languaege like C++, Java or C#.