Python for &while Loop

1        Loops1.1   For inLoops

[email protected] python]# cat for.py

#!/usr/bin/python

#-*-Coding:utf-8-*-

list=[1,2,3,4,5]

For I in list:

Print (i)

List= (1,2,3,4,[3,4], (3,4))

For I in list:

Print (i)

[email protected] python]# python!$

Python for.py

1

2

3

4

5

1

2

3

4

[3, 4]

(3, 4)

[email protected] python]# cat sum100.py

#!/usr/bin/python

#-*-Coding:utf-8-*-

Sum=0

L= list (range (101)) List (range (101)) generates An ordered integer of 0-100

For I in L:

Sum=sum+i

Print (sum)

l=Tuple (range (101))

For I in L:

Sum=sum+i

Print (sum)

[email protected] python]# python sum100.py

5050

10100

1.2   WhileLoops

As long as the conditions are met, the cycle is repeated, and the condition is not satisfied when exiting the loop.

[email protected] python]# cat listpop.py

#!/usr/bin/python

#-*-Coding:utf-8-*-

l=[1,2,3,4]

Num=0

While L:

L.pop ()

Num=num+1

Print (num)

Delete the elements in L until you erase the

[email protected] python]# python listpop.py

4--4 is the number of elements in l

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Python for &while Loop