#python if 用法
a = input("how old are you: ")
if a > 100:
print "你死了"
elif a > 60:
print "你老了"
elif a>18:
print "你成年了"
elif a>0:
print "你还小"
else:
print "你不存在"how old are you: 66
你老了
>>> ================================ RESTART ================================
>>>
how old are you: 665
你死了
>>> ================================ RESTART ================================
>>>
how old are you: 2
你还小
>>> ================================ RESTART ================================
>>>
how old are you: 25
你成年了
>>> ================================ RESTART ================================
>>>
how old are you: －5
Traceback (most recent call last):
File "C:/Python27/print", line 1, in <module>
a = input("how old are you: ")
File "<string>", line 1
－5
^
SyntaxError: invalid syntax
>>> ================================ RESTART ================================
>>>
how old are you: 0.
你不存在
>>> ================================ RESTART ================================
>>>
how old are you: 0
你不存在
