Python的判断语句

比较在Python中比较语句和其它的一样都是用if来做判断的，只是语法上后面会带上冒号，如if a>b:,相当于if（a>b）{}.同样你可以判断函数的返回值为True或者False来做判断__author__="Alex"
__date__ ="$2011-2-17 10:39:27$"
if __name__ == "__main__":
    print "Hello";
a = 3
b = 2
c = 2
# True statements
if c == b: print（"c is equal as b"）
if c >= b: print（"..."）
if a >= b: print（"a is greater than b"）
if c <= a: print（"c is less than a."）
if c ！= a: print（"c is not equal as a"）
# False statements
if c == a: print（"..."）# will show nothing on console
if c ！= b: print（"..."）# will show nothing on console
def inside（）:
    return True
if inside（）:
    print （"Inside"）
else:
    print（"OutSide"）Console OutPut:Hello
c is equal as b
...
a is greater than b
c is less than a.
c is not equal as a
Inside多重比较：当然你可能会用到且或这些操作，在Python中是使用and/or 来做到的，看代码吧，从代码中学习语言才是王道:__author__="Alex"
__date__ ="$2011-2-17 10:39:27$"
if __name__ == "__main__":
    print "Hello";
if 4 > 3 and 6 > 3: print（"You are right , 4 is greater than 3 and 6 is greater than 3 too"） # will print, True and True becomes True
if 4 > 3 and 2 > 3: print（"..."） # will not print, True and False becomes False
if 4 > 3 and not 2 > 3: print（"You are right , 4 is greater than 3 and 2 is less than 3 "） # will print, True and not False becomes True
if 4 > 3 or 6 > 3: print（"You are right...,When 4 is grater than 3 is ture, the condition is ture"） # will print, True or True becomes True
if （4 > 3 and 6 > 3） and not （ 3 > 5 or 3 > 7）: print（"（True and True） and not （ False or False ） becomes True and not False"）#Complex Multiple ConditionsConsole Output:Hello
You are right , 4 is greater than 3 and 6 is greater than 3 too
You are right , 4 is greater than 3 and 2 is less than 3
You are right...,When 4 is grater than 3 is ture, the condition is ture
（True and True） and not （ False or False ） becomes True and not False