[Tutor] While Loop?
Alan Gauld
alan.gauld at btinternet.com
Mon May 19 09:39:40 CEST 2014
On 18/05/14 23:44, Sam Ball wrote:
>> I however would like to add in another line that tells the user their account is invalid
>> before looping around and asking them to re enter their account.
OK, Time to introdusce another Pyhon idioM, the break clause.
while True: # loop forever
get input from user
check/convert input
if no errors:
break # exits the loop
print error message here
"Please Input Your Account Number:")
>> userAccountNumber = int(userAccount)
>
>> As for users typing in a name like "Charlie" or a float I would like that to spit out
>> an error also, but I haven't learned how to accomplish that yet.
The code you have will detect the error and throw an exception.
To stay in the loop you need to catch those exceptions in a try/except
clause.
while True:
try:
get input
check/convert input
break
except error1, error2,....:
print error messages here
If you haven't covered try/except yet then you should read up on it
as it has several variations and subtleties.
HTH
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.flickr.com/photos/alangauldphotos
More information about the Tutor
mailing list