Need help on Python 3 Module 10 Project

Question

Hi- this is my code for the Pythonicness & Packaging unit project. When I run it, None appears after my output, and I can't figure out why.

def concatenate(*args):
for i in args:
if i == '!':
print(i)
else:
print(i + '-')
print(concatenate("I", "love", "Python", "!"))

Answer 1

Concatenation function isn't returning anything and so print prints the output as None.

Answer 2

This will help you:

https://code.sololearn.com/cy7GVry8cCJ1/?ref=app