Re: basic BASIC question

On 31/01/2025 16:39, Dave Froble wrote:

On 1/31/2025 10:18 AM, Arne Vajhøj wrote:

Is it common to use:
>
declare integer constant TRUE = -1
declare integer constant FALSE = 0
>
>
?
>
Arne
>

 It works.  Doesn't really matter if declared a constant.  Zero is false, anything else is true.  Using 1 vs -1 has been more my experience.
 Perhaps the concept of true and false isn't as clear in Basic as in some languages.
 

I am surprised that 1 works if you using it on the result of a logical operation - it is documented:
EXPRESSIONS
   Truth_values
      In relational expressions, BASIC generates -1 when the relationship
      is true  and  0  when it is false.  In logical expressions, BASIC
      evaluates any nonzero value as true; zero is always evaluated as
      false.  To  avoid unanticipated   results,   use  logical operators
      on  the  results  of relational expressions.
--
Chris