Boolean values-assignments in pl/sql, PL-SQL Programming

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Boolean Values

Only the values TRUE, FALSE, & NULL can be assigned to a Boolean variable. For illustration, given the declaration

DECLARE
done BOOLEAN;
the following statements are legal:
BEGIN
done := FALSE;
WHILE NOT done LOOP
...
END LOOP;

Whenever applied to an expression, the relational operators return Boolean value. Therefore, the assignment below is legal:

done := (count > 500);

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