Display boolean

Question

Hi....
I am very new to Oracle and trying to learn SQL/ PL/SQL.I want to display a boolean b using a dbms_output.put_line.
I use the following code:
declare
b boolean:=true;
begin
dbms_output.put_line(b);
end;
It gives the following error:
ERROR at line 1:
ORA-06550: line 4, column 3:
PLS-00306: wrong number or types of arguments in call to 'PUT_LINE'
ORA-06550: line 4, column 3:
PL/SQL: Statement ignored
Kindly suggest..
Thanks,
Alisha.

Answer 1

You can only output string, numbers, or dates (implicitly converted to strings) through dbms_output.put_line.
To output boolean values, you'll either need to write a function that will convert the boolean to a number or string, or use if/else logic to display the values:
if b then
  dbms_output.put_line('True');
else
  dbms_output.put_line('False');
end if;