What is the difference between declaring a static constant and a constant in an unnamed namespace?

Question

As I know, there are two ways to declare a constant variable that is visible in only one file:

• Announce static const int VARIABLE = 1
• Declare it in an unnamed namespace:

namespace { const int VARIABLE = 1; }

And what's the difference?

Answer 1

Since he is const, both have an internal connection, and there is no difference. Therefore, we consider a more interesting case when it is not const.

In this case, in practice, there are few differences.

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