Problem with returning prime number in a simple calculation program
usenet-mail-0306.20.chr0n0ss at spamgourmet.com
Sun Mar 4 00:46:22 CET 2007
QHorizon at gmail.com wrote:
> [reformatted indentation]
> def prime():
> num = input("Number ")
> i = num - 1
> divcounter = 0
> while i > 1:
> if num % i != 0
> divcounter += 1
> i -= 1
> if divcounter == num - 2:
> print num, "is a prime number"
> print num, "is not a prime number"
> As it says in the title, I'm having trouble with the prime number
> function. It will print the sentence if the number is prime, but
> it if isn't, the program goes into a state in the terminal where
> the program never ends and you can just keep on typing.
Sure thing. You designed the function to behave this way.
Look at the while loop -- especially think what happens if
(num % i == 0). i will never be decremented then and the function
will not terminate.
Try inserting print statements for debugging if you don't get what I
> Maybe the else statement is ineffective?
No one can read your thoughts. In which way effective?
BOFH excuse #86:
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