Why is the print statement printing None at the end

Question

def empty(new):
    new1=''
    for i in new:
        new1=i+new1
        print(new1)
    print(new1)    

new='First question'
print(new)
print(empty(new))

output:

First question
F
iF
riF
sriF
tsriF
 tsriF
q tsriF
uq tsriF
euq tsriF
seuq tsriF
tseuq tsriF
itseuq tsriF
oitseuq tsriF
noitseuq tsriF
noitseuq tsriF
None

Question: why do i get none at the end???

Because your function `empty` returns `None` – Abdul Niyas P M Nov 17 '18 at 07:06 — Abdul Niyas P M, Nov 17 '18 at 07:06

score 0 · Accepted Answer · answered Nov 17 '18 at 07:33

0

I think what you want is to replace print(empty(new)) with empty(new). In the first case you are printing the return value of the call to the function empty, which in this case is None because the function doesn't have a return statement.

answered Nov 17 '18 at 07:33

Christian Callau

960
6
11

score 0 · Answer 2 · answered Nov 17 '18 at 08:00

You can either add a return to the function:

def empty(new):
    new1=''
    for i in new:
        new1=i+new1
        print(new1)
    return new1   

new='First question'
print(new)
print(empty(new))

Or call function not in print:

def empty(new):
    new1=''
    for i in new:
        new1=i+new1
        print(new1)
    print(new1)  

new='First question'
print(new)
empty(new)

Why is the print statement printing None at the end

2 Answers2