python defining function ('None')

Question

Python Newbie here!

def x():
 print ('y')

x()

This produces the output- 'y'

BUT

def x():
 print ('y')
a = x()
print (a)

This produces 'y' and 'None' at the end. Why the none at the end?

Because the function returns nothing explicitly so it defaults to None. When you do `a = x()` you store `x`'s return value into `a`. Since there was no explicit return value, it got None. — Andrew Li, Oct 08 '16 at 16:59
the first code also got nothing to return. Why doesn't that show none? — jake willson, Oct 08 '16 at 17:03
Do you see a `print` of the return value somewhere in your first code? No. You don't even catch the reurn value. So why should the program print `None`? — Matthias, Oct 08 '16 at 17:06

score 1 · Answer 1 · answered Oct 08 '16 at 17:05

1

This is because the function x () is returning nothing, hence None.

return 'y' to get print of 'a'.

Hope this helps.

answered Oct 08 '16 at 17:05

Harv

1 Answers1