print("\nthe following users have been confirmed:"for confirmed_user in confirmed_usersprint(confirmed_user title()we begin with list of unconfirmed users at (alicebrianand candaceand an empty list to hold confirmed users the while loop at runs as long as the list unconfirmed_users is not empty within this loopthe pop(function at removes unverified users one at time from the end of unconfirmed_users herebecause candace is last in the unconfirmed_users listher name will be the first to be removedstored in current_userand added to the confirmed_users list at next is brianthen alice we simulate confirming each user by printing verification message and then adding them to the list of confirmed users as the list of unconfirmed users shrinksthe list of confirmed users grows when the list of unconfirmed users is emptythe loop stops and the list of confirmed users is printedverifying usercandace verifying userbrian verifying useralice the following users have been confirmedcandace brian alice removing all instances of specific values from list in we used remove(to remove specific value from list the remove(function worked because the value we were interested in appeared only once in the list but what if you want to remove all instances of value from listsay you have list of pets with the value 'catrepeated several times to remove all instances of that valueyou can run while loop until 'catis no longer in the listas shown herepets py pets ['dog''cat''dog''goldfish''cat''rabbit''cat'print(petswhile 'catin petspets remove('cat'print(petswe start with list containing multiple instances of 'catafter printing the listpython enters the while loop because it finds the value 'catin the list user input and while loops