text: /*
  Enter your query here.
  Please append a semicolon ";" at the end of the query and enter your query in a single line to avoid error.
  */
  
  /*
  Enter your query here.
  Please append a semicolon ";" at the end of the query and enter your query in a single line to avoid error.
  */
  
  set serveroutput on;
  
  declare
      star clob;
  begin
      for i in 1..20 loop
          star := '';
          for j in 1..i loop
              star := star || '*' || ' ';
          end loop;
          dbms_output.put_line(star);
      end loop;
  end;
  /