for语句

1、基本for语句

#! /usr/bin/python
#coding:utf-8
#for loop statement structure

slogan="Welcome to China!"

for i in slogan:
	print i

var=10
for i in var:
	print i

NOTE：只有迭代器（iterator）才能进行for轮询。

2、for经常与range搭配使用

#! /usr/bin/python
#coding:utf-8
#for loop statement structure
#range api 

var = 10
for i in range(var):
	print i

#! /usr/bin/python
#coding:utf-8
#for loop statement structure
#range api 

ProgrammingLanguage="Python"
for i in range(len(ProgrammingLanguage)):
	print ProgrammingLanguage[i],

3、for可用的对象

3.1 字符串

#! /usr/bin/python
#coding:utf-8
#for loop statement structure
string1 = "Python"
for i in string1:
	print i,

3.2 列表

#! /usr/bin/python
#coding:utf-8
#for loop statement structure
list1 = [1, 2, "3", 4.0, [1,2]]
for i in list1:
	print i,

3.3 元组

#! /usr/bin/python
#coding:utf-8
#for loop statement structure
tuple1 = (1, 2, "3", 4.0, [1,2])
for i in tuple1:
	print i,

3.4 字典

#! /usr/bin/python
#coding:utf-8
#for loop statement structure
dict1 ={"Gender":"male", "Country":"China"}
for i in dict1:
	print"%s :%s"%(i, dict1[i])