Super Duper Beginner: Why is my code returning the correct print but also None. any other comments welcome:)

Question

def format_name(first_name, last_name):
if(first_name and last_name):
print("Name: " + last_name + ", " + first_name)
elif(first_name):
print("Name: " + first_name)
elif(last_name):
print("Name: " + last_name)
else:
return string
string=""

print(format_name("Ernest", "Hemingway"))
# Should return the string "Name: Hemingway, Ernest"

print(format_name("", "Madonna"))
# Should return the string "Name: Madonna"

print(format_name("Voltaire", ""))
# Should return the string "Name: Voltaire"

print(format_name("", ""))
# Should return an empty string

Answer 1

print(format_name()) is being used inconsistently. In some cases format_name prints output and then returns nothing. In one case it doesn't print, but it returns a string. Then the print function that called it in the main code prints whatever is returned - either None, or the string.

Instead of printing within format_name, it should always return a string and let the main code do the printing.

Answer 2

Pls save code and share link here..
Identation is much important in python.