Expressions

An expression is a sequence of operands and operators that, when evaluated, produces a single value. The operators in an expression must be compatible with the datatypes of the operator operands. That is, arithmetic operators must have numeric datatype operands and Boolean operators must have Boolean datatype operands. The type of an expression is either arithmetic or Boolean, depending on the datatypes of the operands. Only identifiers associated with variables may be used in expressions. Functions are not supported in expressions.