Python 初阶学习之函数（八）

#encoding:utf-8

def say_hello():

print('num1,,,,,,,')

return'fanhuizhi'

#reture 之后的代码不会执行

print('num2,,,,,,,')

say_hello()

#传参

def say_who(name,age):

print('nishi: %s, ageshi:%d' %(name,age))

#say_why(name = 'cccc', 20) 前一个参数使用了 keyword，后面也必须使用

say_who('aaaa',12)

say_who(age = 18,name = 'bbbbb')

say_who('cccc',age = 20)

#默认值 不传参数会使用默认值

def who(name,age = 28):

print('nishi: %s, ageshi:%d' %(name,age))

who('abc')

who('abc',10)

#阶乘

def cheng(number):

if number == 0:

print(1)

elif number > 0:

count = 1

for i inrange(1,number+1):

count *= i

print('%s 的阶乘为：%s'%(number,count))

else:

print('负数没有阶乘')

cheng(6)