Upon creating a business rule, you need to define the conditions and actions of
your new rule in the WHEN and THEN statements.
Suppose that you want to approve or disapprove a loan according to strict rules regarding the age of the borrower. The defined statement in the below example says that if the age of the person who wants to get a loan meets the specified conditions (younger than 20, or older than 70) then the loan will not be approved.