【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
>>> 
           

1. 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
>>> 
           

1. 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
>>>