Question

Hi everyone, small question. For lecture 6 I tried, before seeiing the answer, to write a bit of code for the palindrome problem. I wrote this:

def IsPalin(word):
if len(word)<=1:
return 'input is palindrome'
else:
if word[0]!=word[-1]:
return 'input is not a palindrome'
else:
word=word[1:-1]
IsPalin(word)

Ok, there is room for improv, but the issue I'm having is this:
when I command eg print('kook'), it prints None!
If I switch the return statements by print statements it returns stat and! None, why is this?