【每天1分钟】PYTHON基础之条件与循环（循环控制）

1. break
   break:跳出循环，不再执行
   流程图

代码示例

>>> for digit in range(10):
if digit == 5:
break
print('the number is: {digit}'.format(digit = digit))
the number is: 0
the number is: 1
the number is: 2
the number is: 3
the number is: 4
>>>
>>> L = list(range(10))
>>> while len(L) >= 1:
tmp = L.pop()
if tmp == 3:
break
print(tmp)
9
8
7
6
5
4
>>>

2. continue
   continue 跳过当前循环的剩余语句，然后继续进行下一轮循环。
   流程图

代码示例

>>> for digit in range(10):
if digit == 5:
continue
print('the number is: {digit}'.format(digit = digit))
the number is: 0
the number is: 1
the number is: 2
the number is: 3
the number is: 4
the number is: 6
the number is: 7
the number is: 8
the number is: 9
>>>
>>> L = list(range(10))
>>> while len(L) >= 1:
tmp = L.pop()
if tmp == 3:
continue
print(tmp)
9
8
7
6
5
4
2
1
0
>>>

3. pass
   pass 不做任何事情，一般用做占位语句。

代码示例

>>> for digit in range(10):
if digit == 5:
pass
print('the number is: {digit}'.format(digit = digit))
the number is: 0
the number is: 1
the number is: 2
the number is: 3
the number is: 4
the number is: 5
the number is: 6
the number is: 7
the number is: 8
the number is: 9
>>>
>>> L = list(range(10))
>>> while len(L) >= 1:
tmp = L.pop()
if tmp == 3:
pass
print(tmp)
9
8
7
6
5
4
3
2
1
0
>>>

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