C++ const in getter

Question

I\'m still learning about C++ and I\'m reading everywhere that I have to use const everywhere I can (for speed reason I think).

I\'m usually write my getter

Answer 1

There is a difference between using the const keyword for the return type or for the method signature. In the first case the returned value will be a constant value. In the second case the method will be a so-called constant method, which cannot change the representation of the object. On constant objects, only the constant methods are callable.