n operator; in &quot;(1-2)&quot;, it is a subtraction operator. The data portion of this token is either OP_NEGATION or OP_SUBTRACTION; the scanner assigns the neutral OP_SUBTRACTION_NEGATION, and the parser decides (from context) which value is appropriate.</DD>
<DT>
%</DT><DD>This can be either of two operators. It can be a percent operator. This is a unary postfix operator which divides its operand by 100; that is, &quot;50%&quot; evaluates to 0.5. It can also be a modulo arithmetic operator. This is a b