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LOGO-L> IF and IFELSE
Michael Tempel (michaelt@media.mit.edu)
Sat, 16 Sep 95 11:09:04 -0400
Bill Kerr suggests that Keith Gum's IF needs to be changed
to IFELSE:
>To correct :response
>if equalp :response :Answer
> [pr [that's right!]]
> [pr[wrong]]
>end
>
>As well as the correction that
>Michael has pointed out I think
>you will need an ifelse, instead
>of an if.
>
>ie. ifelse equal?
> first :response :answer
> [pr "yes][pr "no]
That depends on the version of Logo. Bill is correct for
LogoWriter. But I think Keith is using an older version of
Logo, maybe Apple Logo II. (Keith: What version of Logo
are you using?) In that case IF can be used with or without
the last input.
IF <condition>
<stuff to do if true>
or
IF <condition>
<stuff to do if true>
<stuff to do if false>
In LogoWriter (and MicroWorlds), the second version would
use IFELSE.
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Michael Tempel Tel: 212 765 4918
Logo Foundation FAX: 212 765 4789
250 West 57th Street
New York, NY 10107-2228
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