2.12.4 break（跳出）和continue（跳过）

# continue 仅终止内循环 放遇到Lucy时 跳过；继续下个循环
boys=['mike','jack','tom']
girls=['lily','lucy','mary']
for boy in boys:
    for girl in girls:
        if girl == 'lucy':
            continue
        print('%s kiss %s'%(boy,girl))
'''
mike kiss lily
mike kiss mary
jack kiss lily
jack kiss mary
tom kiss lily
tom kiss mary
'''

# break 仅终止内循环
print('---------------------')
boys=['mike','jack','tom']
girls=['lily','lucy','mary']
for boy in boys:
    for girl in girls:
        if girl == 'lucy':
            break

        print('%s kiss %s'%(boy,girl))
'''
---------------------
mike kiss lily
jack kiss lily
tom kiss lily
'''