Re: LOGO-L> Deletion in logo

[George Mills <mills@softronix.com>]

Typing code into the Commander Input Box does not save your code.
It just runs the command you typed in.

To save your "code" you need to define procedures
that contain your code and then save those definitions
to the disk.

You define procedures by entering something like this
in the Commander Input Box.

EDIT "HELLO

This brings up an editor with an empty definition
for HELLO (if it did not already exist).

Now put your code between the TO HELLO line and the
END line.

Example:

TO HELLO
PRINT "GoodDay
END

Now exit the editor and save it.

Now run HELLO by entering HELLO in the Commander Input Box followed by
Execute button or <Enter> key. Just like you would any logo command.

HELLO
Goodday

You've just extended the logo language by adding a new command
to logo called HELLO.

Now make a change

EDIT "HELLO

TO HELLO :msg
PRINT :msg
END

Exit the editor, save it and run it again

HELLO "Goodbye
Goodbye

Now it is NOT saved to the disk drive yet for another days usage.

SAVE "HELLO.LGO
BYE

Start logo again and reload the definitions you saved.

LOAD "HELLO.LGO

Now you can edit it or run it.

You can also use EDALL instead of EDIT
which will bring up all your procedure definitions.

If you typed a bunch of "code" into the edit box that
you want to create a procedure out of. Then select the
text with the mouse and hit <CTRL-C> which copies the
code to the clipboard.

Now open up the editor (EDALL) and paste the text into
a new procedure (bewteen a TO line and END Line).
Usually when you do this you tend to clean up the
code you copied.

If you use EDALL and delete a definition from the editor
that definition will be removed. What You Edit Is What You Get.

You can also delete a definition from the commander or File Menu.

ERASE "HELLO

Note SAVE, LOAD, EDIT, EDALL and ERASE can all be done through
the file menu. Save and load tend to be easiest through the menu
while issuing EDALL from the commander input box is all you
need for all procedure maintainance.

roger carberry wrote:
> 
> I have just started using logo in the school where I teach. I am using
> MSWlogo. I am having some difficulty in finding how to delete or edit  code
> I have already typed in to the input box at the bottom of the screen. What I
> am doing at the moment is closing down the app and starting over. There must
> be an easier way. Is there anyone out there who knows how I can accomplish
> this
> thanks
> roger
> 
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-- 
===============================================================
George Mills
email: mills@softronix.com
http://www.softronix.com
The www page contains some very powerful educational software.
Our single most important investment is our kids.
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