[Coco] What are the rules for naming basic09 variables ?

[L. Curtis Boyle]

As I mentioned, the length of a variable name is only limited to the amount of RAM you have left in your process space. 

Sent from my iPhone

> On Jul 27, 2019, at 5:16 PM, coco at jechar.ca wrote:
> 
>> On 2019-07-27 19:01, Gene Heskett wrote:
>>> On Saturday 27 July 2019 04:44:14 Gene Heskett wrote:
>>> On Friday 26 July 2019 16:21:58 Wayne Campbell wrote:
>>> > Up to 29 characters, 0-9, a-z, A-Z, _
>>> I think its 28 active, to make room for the terminating zero of the
>>> string.
>> I was mistaken, it is 29, with D7 set in the last character, high bit set
>> IOW.
>>> > $ only if a string variable, only as last character of the variable
>>> > name. Not sure, but I think first character has to be a letter?
>>> >
> Actually I was surprised to see that even 40 characters is not too many and
> that two variables can be distinguished I tried several things and made comments
> out of the errors. See listing below. Add to it as you like and re-post.
> 
> PROCEDURE vname
> (* Development test program *)
> DIM TI:STRING
> (* DIM ti:STRING cannot be declared as basic09 is case insensitive &  TI is *)
> (* already declared *)
> DIM is_variable_is_long_to_distinguish_fromB:STRING
> DIM is_variable_is_long_to_distinguish_fromA:STRING
> (*  DIM 1llegal_starts_with_numeric:STRING *)                                *)
> DIM legalALPHA_NUMER1C:STRING
> (* DIM String$ilegal:STRING results in ERROR 33 *)
> DIM legal$:STRING
> is_variable_is_long_to_distinguish_fromB="A"
> is_variable_is_long_to_distinguish_fromA="B"
> (* 456789X123456789X123456789X123456789X = 40 Characters WOW  *)
> PRINT
> PRINT is_variable_is_long_to_distinguish_fromB
> PRINT "CORRECT !!"
> PRINT is_variable_is_long_to_distinguish_fromA
> PRINT "CORRECT WOW !!"
> PRINT "DONE"
> END
> 
> 
> Charlie
> 
>>> > Wayne
>>> >
>>> > On Fri, Jul 26, 2019, 1:00 PM <coco at jechar.ca> wrote:
>>> > >   I have seen examples of variable names 10 or 11 characters long
>>> > > and of the $ being used in a
>>> > >   variable name.
>>> > >
>>> > >   So I know that alpha numeric and $ are legal components and at
>>> > > least 10 characters long but I cannot
>>> > >   find the explicit rules so for example is underscore a legal
>>> > > variable name component, what is the
>>> > >   maximum number of characters  in a variable and are they all
>>> > > used or for example would
>>> > >   VARIABLE1 be the same as VARIABLE2 because first eight
>>> > > characters are all the same ?
>>> > >
>>> > >   Only answer what you know for sure. I could always try writing a
>>> > > bunch of test programs to
>>> > >   come up with the rules experimentally but perhaps someone knows
>>> > > the exact restrictions on basic09
>>> > >   variable naming ?
>>> > >
>>> > >   Charles
>>> > >
>>> > > --
>>> > > Coco mailing list
>>> > > Coco at maltedmedia.com
>>> > > https://pairlist5.pair.net/mailman/listinfo/coco
>>> Cheers, Gene Heskett
>>> --
>>> "There are four boxes to be used in defense of liberty:
>>> soap, ballot, jury, and ammo. Please use in that order."
>>> -Ed Howdershelt (Author)
>>> If we desire respect for the law, we must first make the law
>>> respectable. - Louis D. Brandeis
>>> Genes Web page <http://geneslinuxbox.net:6309/gene>
>> Cheers, Gene Heskett
>> --
>> "There are four boxes to be used in defense of liberty:
>> soap, ballot, jury, and ammo. Please use in that order."
>> -Ed Howdershelt (Author)
>> If we desire respect for the law, we must first make the law respectable.
>> - Louis D. Brandeis
>> Genes Web page <http://geneslinuxbox.net:6309/gene>
> 
> -- 
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>