關於python return 和 print 的區別

   概念上一個是 返回值   一個是打印輸出  

區別一：return是結束語一般放在函數的最后，當你在return 結束后面再寫一些東西是不執行的如 下

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


print (renshu(3,7))

執行后的結果是 Hello  word  不執行。沒有報錯

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)

執行結果是
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)

報錯信息

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