Syntax / sanity check

KenM

BS2p...

Using IF, I can use a compound AND condition·such as;

IF  gear >90 THEN FIRST
IF  (gear > 50) AND (gear < 91) THEN SECOND
IF  (gear > 35) AND (gear < 51) THEN THIRD
IF  (gear > 14) AND (gear < 36) THEN FOURTH

But can the same be done with Select Case? (I get error messages with various iterations using AND, or colon etc)

 SELECT gear
   CASE > 90                
       'some code
 
   CASE (> 50 ) AND (< 91 )
       'some other code
 
   'etc, etc
 
 ENDSELECT 

 SELECT gear
   CASE > 90                
       'some code
 
   CASE (gear > 50 ) AND ( gear < 91 )
       'some other code
 
   'etc, etc
 
 ENDSELECT 

From the help file (yes I read it)...

···SELECT Expression
· · ·CASE Condition(s)

Statement(s) is any valid PBASIC statement or statements. Multiple statements may be placed on the same line (though not recommended) by separating each statement with a colon ( : ).

Bottom line...Can an AND condition be used with CASE, and if so, the proper syntax is?

Jon Williams

Yes.· You would use "TO" to express a range of values as shown below:

· SELECT gear
·· ·CASE·> 90
··· · ' first
··· CASE 51 TO 90
···· ·' second
·· ·CASE 36 TO 50
···· ·' third
· · CASE 15 TO 35
··· · ' fourth
· · CASE ELSE
··· · ' bad value
· ENDSELECT

Another way to do the range thing -- that more closely matches your IF-THEN construct -- is like this:

· SELECT gear
·· ·CASE·> 90
··· · ' first
··· CASE·> 50, < 91
······' second
·· ·CASE > 35, < 51
······' third
· · CASE > 14, < 36
····· ' fourth
· · CASE ELSE
··· · ' bad value
· ENDSELECT

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Jon Williams
Applications Engineer, Parallax
Dallas, TX· USA

KenM

Thank you Jon

·P.S. Did I miss the solution in the help file? I thought I read it carefully.

I am using V2.2

Post Edited (KenM) : 5/10/2005 1:43:35 PM GMT

Chris Savage

Ken,

·· Yep, it was there...

Help File said...
Condition is a statement, that can be evaluated as True or False. The Condition can be a very simple or very complex relationship, as described below. Multiple conditions within the same CASE can be separated by commas ( , ).

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Chris Savage
Parallax Tech Support
csavage@parallax.com

KenM

I hate it when that happens !