Answer Posted / prejib

NULL.

SQL> DECLARE
2 v_boolean BOOLEAN;
3 BEGIN
4 IF v_boolean = TRUE
5 THEN
6 DBMS_OUTPUT.put_line ('Default value is TRUE');
7 ELSIF v_boolean = FALSE
8 THEN
9 DBMS_OUTPUT.put_line ('Default value is FALSE');
10 ELSIF v_boolean IS NULL
11 THEN
12 DBMS_OUTPUT.put_line ('Default value is NULL');
13 END IF;
14 END;
15 /
Default value is NULL

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