Thank you Alan. But a question here, how would it understand that the given input is valid?
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. On Wed, Nov 26, 2014 at 3:46 PM, Alan Gauld <alan.ga...@btinternet.com> wrote: > 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 <d...@hashcollision.org >> <mailto:d...@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 > http://www.alan-g.me.uk/ > http://www.amazon.com/author/alan_gauld > Follow my photo-blog on Flickr at: > http://www.flickr.com/photos/alangauldphotos > > > > _______________________________________________ > Tutor maillist - Tutor@python.org > To unsubscribe or change subscription options: > https://mail.python.org/mailman/listinfo/tutor >
_______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
