Boolean Type
A Boolean primitive type value is one of the logical truth-values represented by the standard JADE identifiers true and false.
JADE provides standard operators that take Boolean values as operands, and produce a Boolean result. These operators include the logical:
Boolean values can also be produced by applying relational operators to operands of other types. JADE provides the standard relational operators listed in the following table.
| Operator | Description |
|---|---|
| = | Equal to |
| < | Less than |
| > | Greater than |
| >= | Greater than or equal to |
| <= | Less than or equal to |
| <> | Not equal to |
A relational operation consists of two operands separated by a relational operator. If the relation is satisfied, it has the value true. If the relation is not satisfied, it has the value false. The result of a relational operation is therefore a Boolean value.
The following example shows the use of the Boolean primitive type.
isMarried(): Boolean;
begin
return spouse <> null;
end;
For details about the method defined in the Boolean primitive type, see "Boolean Method", in the following subsection. For details about converting primitive types, see "
