# If balance is private, what is the upper bound on the number of lines of code which must be examined to make the change to the Account class? \
What is the "upper bound on the number of lines of code" referring to?
maybe it's just because it's still early but ... what are you talking about??
do remember, we do not know the Account class you are referring to, we do not know the rest of the code you're working on. we do not know the changes that have to be made to Account, and we know nothing of the code that should make those changes.
further more, could you please specify what you mean by 'the upper bound on the number of lines of code'?