Python【循环】

Python【循环】

while

# while循环
i = 0
while i < 7:
    print(i,end=" ")
    i += 1

输出：0 1 2 3 4 5 6

while可以配合一个else语句，就是在循环条件不满足时，执行一次：

# while循环
i = 0
while i < 7:
    print(i,end=" ")
    i += 1
else:
    print('i is no long less than 7')

输出：

0 1 2 3 4 5 6 i is no long less than 7

但是如果是break语句终止了循环的话，那就不会执行else语句中的内容了：

# while循环
i = 0
while i < 7:
    print(i,end=" ")
    i += 1
    break
else:
    print('i is no long less than 7')

输出：0

for

# for循环
xx = ['A','B','C']
for i in xx:
    print(i,end=' ')

输出：A B C

# for循环
for i in range(10,30):
    print(i,end=' ')

输出：10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29