In nu/TPU, all odd integers can be used to represent the Boolean value TRUE,
and all even integers can be used to represent the Boolean value FALSE. This is
different from some popular languages like 'C', where zero is FALSE, and any
non-zero value is TRUE.
Thus the result of (7 AND 9) is 1 and TRUE. The result of (7 AND 10) is 2 and
FALSE.
When executing a Boolean expression, nu/TPU evaluates expressions enclosed in
parentheses before other elements. When using multiple operators (logical or
otherwise) in one expression, you should use parentheses to ensure that the
compiler evaluates expressions in the order you intend. For example, the
following IF clause shows how to parenthesize an expression containing both logical and
relational operators:
IF (x = 12) AND (y <> 40)
BOOLEAN_EXPRESSIONS