Python----循环结构

cities = ['AC','AD','AE']
for city in cities:
    print(city)

i = 0
while i < 3:
    i = i+1
    print(i)

for i in  range(10):
    print(i)

cities = [[1,2,3,4],['a','b','c']]
print (list)
for city in cities:
    print(city)
    
for i in cities:
    for j in i:
        print(j)