[Tutor] loop questions

[Mark Lawrence]

On 06/04/2013 23:00, Soliman, Yasmin wrote:
> I have two questions on these simple programs:
>
> 1st why does this loop keep repeating after I enter 'Quit'?
>
> import calendar
> m = raw_input(“Enter a year: “)
> while m != “Quit”:
>   if calendar.isleap(int(m)):
>    print “%d is a leap year” % (int(m))
>   else:
>    print “%d is not a leap year” % (int(m))
>

Already answered by Mitya Sirenef.

>
> 2nd  How can I make this program not crash when a user enters a non integer?

The program doesn't crash, it raises an exception.

>
> m = raw_input(“Enter an integer: “)
> while not m.isdigit():
>   m = raw_input(“Enter an integer: “)
>   num = int(m)

try:
     num = int(m)
except ValueError:
     doSomething

I'll leave you to restructure the loop.

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Mark Lawrence