python教程13--《控制语句之 if、while、for》

# encoding: utf-8

#一、if语句
if False:
print("False")
else:
print("True")         #True

#二、while循环
x = 0
while x < 5:
x += 1
# if x > 5:
#     break
print x
else:
print ("while end")   #要想执行到这.则不能用break.

"""
1
2
3
4
5
while end
"""

#三、for循环
for x in "iamlileihahaha":
print x

"""
i
a
m
l
i
l
e
i
h
a
h
a
h
a
"""

for x in "i am lilei hahaha".split(' '):
print x

"""
i
am
lilei
hahaha
"""

print x                 #hahaha   说明for循环执行执行完之后，x的值还在保留着最后一个迭代的值