python打印图形

i = 0
while i < 5:
    # print('*****') 效果与下行相同
    print('*'*5)
    i+=1

print('\n\n')

i = 1
while i < 6:
    print('*'*i)
    i+=1

print('\n\n')

i = 1
while i < 6:
    print('*'*(6-i))
    i+=1