20170417循环（loop）

1.for 循环

①for num in range(1,11):
    print(str(num)+' + 1 = ',num + 1)

②song_list = ['Holy Diver','Thunderstruck','rebel rebel']
for song in song_list:
    if song == 'Holy Diver':
        print(song,'-Dio')
    elif song == 'Thunderstruck':
        print(song,'-AC/DC')
    elif song == 'rebel rebel':
        print(song,'- DAVAID BOWIE')