Python for &while 循环
1 循环1.1 For in循环# cat for.py#!/usr/bin/python
# -*- coding:utf-8 -*-
list=
for i in list:
print(i)
list=(1,2,3,4,,(3,4))
for i in list:
print(i)# python !$
python for.py
1
2
3
4
5
1
2
3
4
(3, 4)
# cat sum100.py
#!/usr/bin/python
# -*- coding:utf-8 -*-
sum=0
l=list(range(101)) list(range(101))生成0-100的有序整数
for i in l:
sum=sum+i
print(sum)
l=tuple(range(101))
for i in l:
sum=sum+i
print(sum)
# python sum100.py
5050
10100
1.2 while循环只要条件满足，就不断循环，条件不满足时退出循环。
# cat listpop.py
#!/usr/bin/python
# -*- coding:utf-8 -*-
l=
num=0
while l:
l.pop()
num=num+1
print(num)
删除l中的元素，直到删尽
# python listpop.py
4--4为l中的元素个数
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