What is #define in c++

Question

In c++ language we need to define an imaginary function and then we call it any where in main function or in any other function.

Answer 1

Thanks for asking a question and answering it😂

Answer 2

That barely touches the possibilities of #define. It can define constants, shorter names for anything, change the looks of the language, hide the details that make an implementation of something confusing, plus other things I've never done.