Extern vs extern "C"

Question

Hi

1.

I had thought that extern is used to modify the variable in different translation unit...

For example,
//this is in main.cpp
namespace Abc
{
extern int x;

};

//also in main.cpp
int Abc::x = 0;

above means x is declared in namespace but main.cpp has also its scope (outside of namespace as well) and initialized to 0

Is above correct ?

Next query is as below :

2.

What if i have
extern "C" int x; in question 1?

Is extern "C" not only used for namemangling and tell that this can be accessed in c code as well ?

With extern "C" also, do we get same effect of extern alone ?

Answer 1

Ketan Lalcheta
A simple search reveals:
https://stackoverflow.com/a/38208679/17982392