How i understand "raising errors"

Question

suppose i want an user to input a name which consist of alphabets only.
and the user enters numbers.
here i can raise an error.
thank u

Answer 1

Yes, you are correct.
Errors can be raised to sent out an alert message when a certain condition arises in you code. It can b an error or even a normal event like u said name being only characters. Raising errors is simply a way to specify user defined errors.

Answer 2

Shraddha , can you make me clear a little bit about why we must use raise exception , what is the purpose for that?