If statements vs case
ambassador at fourthworld.com
Sun Feb 25 22:03:30 EST 2007
Hershel Fisch wrote:
>>> Hi every one, how would one put the differences between multiple if, else
>>> if's vs. case's
>> In many respects they're quite similar, and for many uses the choice of
>> one over another can be a matter of stylistic preference.
>> But there is at least one functional difference which may be worth
>> keeping in mind; I don't use it often, but I'm grateful for it when I do:
>> Case statements allow a fall-through option, so that each case need not
>> be exclusive the way if-then is.
>> For example, in this block:
>> switch tVar
>> case "a"
>> case "b"
>> case "c"
>> case "d"
>> case "e"
>> end switch
>> ..the cases "a" and "b" both trigger "DoThing1", and the hit the break
>> so they exit.
> On 2/25/07 9:31 PM, "Richard Gaskin" <ambassador at fourthworld.com> wrote:
> Wouldn't be the same as
> If tVar ="a" or tVar ="b" then
> If tVar = "c" then
> If tVar ="d" then
> Enf if
> End if
> End if
Good point. I suppose it may well be as simple as Jim put it, that the
difference is stylistic. But FWIW, I find the case example above much
quicker to skim to grasp the logic than the if-then example below it. I
don't know if the literature supports that anecdotal observation, but
since most languages include case there must be good value in it.
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