关于python return 和 print 的区别

   概念上一个是 返回值   一个是打印输出  

区别一：return是结束语一般放在函数的最后，当你在return 结束后面再写一些东西是不执行的如 下

def   renshu(x,y):
     h=x+y
     print (h)
     return  h 
     print ('hello  word')


print (renshu(3,7))

执行后的结果是 Hello  word  不执行。没有报错

C:\Python34\python.exe C:/Users/Administrator/PycharmProjects/python/class/suibi.py
10
10

C:\Python34\python.exe C:/Users/Administrator/PycharmProjects/python/class/suibi.py
10
10

def   renshu(x,y):
     h=x+y
     print (h)
     return  h
     print ('hello  word')


print (renshu(3,7))

x= (renshu(3,7))+10
print (x)

执行结果是
C:\Python34\python.exe C:/Users/Administrator/PycharmProjects/python/class/suibi.py
10
10
10
20

Process finished with exit code 0

 

def   renshu(x,y):
     h=x+y
     print (h)




print (renshu(3,7))

x= (renshu(3,7))+10
print (x)

报错信息

None
  File "C:/Users/Administrator/PycharmProjects/python/class/suibi.py", line 13, in <module>
10
    x= (renshu(3,7))+10
TypeError: unsupported operand type(s) for +: 'NoneType' and 'int'

Process finished with exit code 1