Python: None

Question

I searched for the exact question but still can't understand....

def some_func():
print("Hi!")

var = some_func()
print(var)

the output : Hi!
None

Where did None came from? I learnt about functions before this doesn't do like this... Please explain like im five...

Thanks in advance!

Answer 1

because you print Hi! in the function. either just call:

some_func() # NO print

or in the function, RETURN "Hi!" instead of printing it. Then you can call:

print(some_func())

Answer 2

The reason is:

All python functions do return the value None except there is an explicit return statement written with a value other than None.

The fact that None is returned, is NOT related with the print() statement in the function. if you replace this print statement like this:

def some_func():
"hello"

the function will return None anyway.

Answer 3

def somefunc():
return "Hi!"
print(somefunc())