Logical and Relational Operators In The Microsoft Dynamics NAV C/AL Logical and Relational operators are always result in a boolean value ie, either TRUE or FALSE. Relational Operator Relational operator is used in the relational expressions to test a relationship between the term preceding it and the term following it, resulting in a boolean value. These operators are listed below = (equal to) IN (Included in set) > (grater than) (not equal to) Logical Operator Logical operator uses one or two Boolean terms in a logical expression. The logical binary operators are AND, OR and XOR (exclusive or). The one logical unary operator is NOT.