using IF THEN with ranges?

TonyA

Hi,

I was using this:

IF result = 2 TO 10 THEN
GOSUB sub_routine

How can you use a range like this?

or must it be a string of code like:

IF result <= 1 THEN
GOSUB sub_routine
ENDIF

IF result >= 2 THEN
GOSUB sub_routine
ENDIF

Thank you,

TonyA

Post Edited (TonyA) : 9/9/2005 7:47:55 PM GMT

Chris Savage

Tony,

·· How about:

IF result < 2 or result > 10 THEN
   GOSUB sub_routine
ENDIF

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Chris Savage
Parallax Tech Support
csavage@parallax.com

Bruce Bates

Tony -

Generally, when working with ranges of data, the SELECT - CASE statement is a good choice, and is nearly self-documenting, if done right. Check the online PBASIC HELP file for details.

Regards,

Bruce Bates

Jon Williams

If testing just one range, use IF-THEN as it's more efficient.· For your range of 2 to 10 (inclusive), you'd do this:

· IF ((result >= 2) AND (result <= 10)) THEN
··· ' do something
· ENDIF

Note the use of parenthesis -- while not required, the use of parenthesis helps the code look neater and easier to read.· If you need to do separate things for different ranges, use SELECT-CASE like this:

· SELECT result
··· CASE 2 TO 10
····· ' do something
··· CASE 15 TO 18
····· ' do something else
··· CASE > 25
····· ' do something else altogether
· ENDSELECT

These programming things are covered in What's a Microcontroller? -- that book may be worth a read (and you can download it for free!).

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Jon Williams
Applications Engineer, Parallax

Post Edited (Jon Williams (Parallax)) : 9/9/2005 9:47:44 PM GMT

TonyA

Hi,

Yes, this is great. I'll be using the Select Case thing since I have a number of ranges I need to work with.

Thanks for the info and help.

TonyA