Output showing "None" in Terminal

[Py Noob]

Thank you so much for the help.

I'm self-studying and watching tutorials on youTube. The problem was given
as an exercise after the tutorial.
I did modify my code based on the suggestions here and it helps.

Thank you!

On Tue, Aug 25, 2020 at 4:31 PM Schachner, Joseph <
Joseph.Schachner at teledyne.com> wrote:

> The very first line of your function km_mi(): ends it:
> def km_mi():
>     return answer
>
> answer has not been assigned, so it returns None.
>
> Advice: remove that "return" line from there.  Also get rid of the last
> line, answer = km_mi which makes answer refer to the function km_mi().
> Put the "return answer" line at the end, where the "answer=km_mi" used to
> be.
>
> That should help.  The code calculates "answer".   It prints "answer".
>  You should return "answer" at the end, after it has been calculated.
>
> --- Joseph S.
>
> -----Original Message-----
> From: Py Noob <pynoob76 at gmail.com>
> Sent: Monday, August 24, 2020 9:12 AM
> To: python-list at python.org
> Subject: Output showing "None" in Terminal
>
> Hi!
>
> i'm new to python and would like some help with something i was working on
> from a tutorial. I'm using VScode with 3.7.0 version on Windows 7. Below is
> my code and the terminal is showing the word "None" everytime I execute my
> code.
>
> Many thanks!
>
> print("Conversion")
>
> def km_mi():
>     return answer
>
> selection = input("Type mi for miles or km for kilometers: ")
>
> if selection == "mi":
>     n = int(input(print("Please enter distance in miles: ")))
>     answer = (1.6*n)
>     print("%.2f" % answer, "miles")
>
> else:
>     n = float(input(print("Please enter distance in kilometers: ")))
>     answer = (n/1.6)
>     print("%.2f" % answer, "kilometers")
>
> answer = km_mi
>
>