Replace for Goto

[Robert Clark]

play the game once
priming read
while answer is yes
play the game again
trailing read
wend

[RC]
----- Original Message -----
From: "Gerhard Häring" <gh at ghaering.de>
To: <python-list at python.org>
Sent: Wednesday, May 28, 2003 6:02 PM
Subject: Re: Replace for Goto


> Dvm5 wrote:
> > I'm used to Basic. There is a Goto/Label command, you put goto where
> > you want it to come from and label where you want it to go. Simple.
> > How can I do this in Python?
>
> You can't. This is a feature, not a bug ;-) With the control structures
> Python offers (for loops, while loops, functions, exceptions), GOTO is
> not necessary.
>
> Where you'd have used goto in BASIC, you can most of the time find a
> clearer form and use "break" and "continue" statements. For the few
> cases where this is not possible and you don't want to introduce a
> temporary boolean variable, you can use exceptions to break out of
> nested loops, for example.
>
> > What I'm trying to do is create a "play again" type user interface.
> > Thus, I can't alter the program to use an If command; the option has
> > to be at the end, and the effect has to be at the begining! How do I
> > accomplish this?
>
> Use a never-ending while loop, then use an "if" and a "break". Like this:
>
> while 1:
>      # do stuff
>      answer = raw_input("Want to play again? (y/n)").upper()
>      if answer == 'N':
>          break
>
> > If there is another way, other than a similar thing to Goto, tell me
> > that, as well as a similar thing for goto. It would probably be useful
> > later on...
>
> See above. I'd suggest that you learn Python by following one of
> tutorials at http://www.python.org/doc/Newbies.html
>
> These will teach you the Pyhton way of doing things, which is better
> than finding equivalents for what you did in BASIC.
>
> -- Gerhard
>
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