text: set serveroutput ON
  declare
      type my_ac_var is table of number index by varchar2(50);
      v_var  my_ac_var ;
      v_counter varchar2(50);
  begin
      v_var('python'):=1000;
      v_counter:=v_var.FIRST;
      v_var('flask'):=2000;
      while v_counter is Not NULL 
      loop
          dbms_output.put_line('value of ' || v_counter || 'is ' || v_var(v_counter));
          v_counter:=v_var.NEXT(v_counter);
      end loop ;
      /*fetching the data in here */
      -- v_counter_next:=v_var.NEXT();
      
  end;
  /
  