What is the difference between Constant and Constant Variable??

Question

knowledge

Answer 1

A constant cannot be changed after instantiation. And I don't know what a constant variable is. A paradox maybe?

Answer 2

The latter defines the former.

A variable that cannot be changed is a Constant.
There is no such thing as "Constant variable".

Answer 3

when declaras one variable this have one value that can change in other moment, but when declared a variable const this have that have a value and this never change