If you want to implement the algorithm for calculating the check digits
of the bank account for your country or for a country that you know,
you have to add to the array this function returns the ISO 3166 code
and the country name.
TODO
45
If you want to implement the algorithm for calculating the check digits
of the bank account for your country or for a country that you know,
you have to add it like a switch/case option. Please put all your code
inside your case option including functions.