Why is const-correctness specific to C++?

Question

Disclaimer: I am aware that there are two questions about the usefulness of const-correctness, however, none discussed how const-correctness is necessary in C++ as oppos

Answer 1

I don't think anybody claims const-correctness is "necessary". But again, classes are not really necessary either, are they? The same goes for namespaces, exceptions,... you get the picture.

Const-correctness helps catch errors at compile time, and that's why it is useful.