mySet = {1, 2, 3} mySet.add(4) print(mySet) # Output: # {1, 2, 3, 4} mySet2 = {1, 2, 3} mySecondSet = {4, 5} mySet2.update(mySecondSet) print(mySet2) # Output: # {1, 2, 3, 4, 5}