[Tutor] bubble sort function

[Alan Gauld]

On 26/11/14 09:57, Sunil Tech wrote:
> Hi Danny,
>
> Curious to the use the need of using while True in the given example of
> ask_for_a_digit().
>
>
> On Mon, Nov 17, 2014 at 9:57 AM, Danny Yoo <dyoo at hashcollision.org
> <mailto:dyoo at hashcollision.org>> wrote:
>
>     > def ask_for_a_digit():
>     >     while True:
>     >         digit = raw_input("Give me a digit between 0 and 9.")
>     >         if digit not in "0123456789":
>     >             print "You didn't give me a digit.  Try again."
>     >         else:
>     >             return int(digit)

The while loop makes it keep on asking until a valid input is
received. Without the while loop it would only ask once and
either return None or a digit.

HTH
-- 
Alan G
Author of the Learn to Program web site
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