On Wed, Jan 25, 2012 at 10:36 PM, Michael Lewis <mjole...@gmail.com> wrote:
> Is it generally better to use try/except/else statements or if/elif/else?
> Or, is there a time and place for each?
There's a time and place for each. Most errors are indicated in the
form of an exception being raised, though.
> For a simple example, assume I want a user to enter a number
>
> 1) try:
> number = float(input('enter a number: ')
> except ValueError:
> print('enter a number.')
> else:
> print('you entered a number')
>
> OR
>
> 2) number = float(input('enter a number: ')
> if number >=0 or < 0:
> print('you entered a number')
> else:
> print('enter a number.')
>
float(x) doesn't return anything if the value it's passed can't be
converted to a float. The first way is the only way.
-- Devin
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