SQL & PL/SQL

Hi All,

Going thorugh one of the blogs, i came across the below ananymous block. I am not able to understand, how the output will be as 'ELSE PART', as we are not comparing X with any of the values. Could you please explain how it will be.

SQL> DECLARE
  2    x BOOLEAN;
  3  BEGIN
  4    IF X THEN
  5      dbms_output.put_line('IF PART');
  6    ELSE
  7      dbms_output.put_line('ELSE PART');
  8    END IF;
  9  END;
 10  /
ELSE PART

PL/SQL procedure successfully completed.

SQL>

Thanks All in advance,

Thanks