Static v/s Const variables.

Static variable keep their values and are not destroyed even after they go out of scope.

Eg:
          int ReturnNumber()
          {
               Static int n_id = 0;
               return n_id++;
          }
          int main()
          {
                std::cout<<ReturnNumber();
                std::cout<<ReturnNumber();
                std::cout<<ReturnNumber();
               
                return 0;
          }

Output:    0 1 2.

Const:
         The const keyword specifies that variable's value is constant and tells the compiler to prevent the programmer from modifying it.

 Eg:        const int n = 5;
               n++;          // Error
               n=6;          // Error.
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