> I have this little program that is supposed to calculate how many diagonals a
> polygon of x sides has, but it does not return what I have in the "return"
> part of the function when I call it. Here is the code:
>
> def num_diag(var):
> ans = 0
> if var <= 3:
> print("No diagonals.")
> else:
> for i in range(num_sides - 3):
> ans = ans + i
>
> return (((var - 3)*2) + ans)
>
> num_sides = (int(raw_input("Enter sides: ")))
> num_diag(num_sides)
>
>>> num_diag(5)
NameError: global name 'num_sides' is not defined
`for i in range(num_sides - 3):`
Change num_sides to var.
Ramit
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