How to OR and AND operator in CLIPS?

Question

I need to OR and AND operator while expression evaluation, but when I use it to CLIPSDOS it give wrong result.

CLIPS (6.31 6/12/19)
CLIPS> ( and 0 1 )
TRUE
CLIPS>

I expect the output FALSE but it give TRUE What could be wrong?

Answer 1

In C, the integer 0 is false and any other integer is true.

In CLIPS, the symbol FALSE is false and any other value is true.

         CLIPS (6.31 6/12/19)
CLIPS> (and 0 1)
TRUE
CLIPS> (and 1 2)
TRUE
CLIPS> (and FALSE TRUE)
FALSE
CLIPS>