Help!! - Printable Version

Help!! - Printable Version

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+--- Thread: Help!! (/thread-41647.html)

Help!! - prem_koresh_avraham - Feb-22-2024

def hint_username(username):
    if len(username) < 3:
        print("Invalid username. Usernames must have more than 3 characters")
    else:
        print("valid username")
        
print (hint_username("charmingchand"))

OUTPUT

Output:valid username
None

I would like to know why is none appearing here?

RE: Help!! - menator01 - Feb-22-2024

You are using print twice. Once in the function and when calling the function.
Please use the bbtags when posting code. You should have a look at the help section on how to ask a question.

Quick example:

def afunc(arg):
    return arg

def afunc2(arg):
    print(arg)

print(afunc('I am using a return value and print'))

afunc2('Callinga function that has a print')

print(afunc2('Using both prints. This will return a None'))

Output:I am using a return value and print
Calling a function that has a print
Using both prints. This will return a None
None

RE: Help!! - paul18fr - Feb-22-2024

In addition to what it has previously said, that's the return content which is returned using print (None by default if not specified)

def hint_username(username):
    if len(username) < 3:
        print("Invalid username. Usernames must have more than 3 characters")
    else:
        print("valid username")        
    return None
         
hint_username("charmingchand")
hint_username("ff")
print()

# with print
print(hint_username("\n"))
print(hint_username("ddddddddddddddddddddddddd\n"))

Output:valid username
Invalid username. Usernames must have more than 3 characters

Invalid username. Usernames must have more than 3 characters
None
valid username
None