Python基础（九）--函数

>>> def calculate(x,y):    #定义函数名为calculate，参数为x和y
    result = x+y
    return result             #返回结果

>>> a = calculate(x=3,y=4)       #调用，关键参数x=3,y=4
>>> print(a)
7

>>> def calculate(x,y,z=3):       #默认参数为z=3
    res = x+y+z
    return res

>>> a = calculate(3,4)　　　　　　　　#位置参数对应,z可以不给定
>>> print(a)
10

>>> def register(name,age,cn=00,*args,**kwargs):
    print(name)
    print(age)
    print(cn)
    print(args)
    print(kwargs)

    
>>> register(‘xing‘,‘55kg‘,‘yang‘,‘666‘,height=170)
xing
55kg
yang
(‘666‘,)
{‘height‘: 170}

>>> def test():
    return 1,2,4,4

>>> test()                #返回多个值会将变成元组
(1, 2, 4, 4)

>>> name = ‘xing‘        #全局变量
>>> def test():
    name = ‘lala‘        #局部变量
    print(name)

    
>>> test()
lala
>>> print(name)
xing