python basics-loop

巴扎黑
巴扎黑Original
2016-12-03 09:14:371086browse

for loop:

a = [11,22,33,44]

for i in a:
print (i)

result:

11
22
33
44

while loop:

i=0
while i print (i)
i += 1

Result:

0
1
2

break and Continue:

i= 0
while i print ("i->:",i)
if i == 5:
break #When i==5, exit all loops
i += 1

Result:

i->: 0
i->: 1
i->: 2
i->: 3
i->: 4
i->: 5
x=0
while x for x in range(0,10):
if x ==6:
continue #when x== At 6 o'clock, jump out of the current loop and continue to the next loop
                                                                                                                                        Jump out of the current loop and continue to the next cycle. 2
x->: 3

x->: 4

x->: 5

x->: 7 #missingx->: 6

x->: 8
x->: 9


Others:

enumrate:

a = ["aa","bb","cc","dd"]

for i in enumerate(a,5): #The default number starts from 0, Can be changed manually

Print (i)

Result:


(5, 'aa')
(6, 'bb')
(7, 'cc')
(8, 'dd')

range :


1,

for n in range(1, 10):
print (n)

Result:

1

2
3
4

5

6

7

8
9


2 ,

for x in range(0,20,4):
print (x)

Result:

0

4
8
12

16

#Use 4 as step and print




Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn