sql>declare
  2    type ele is record(a number, b varchar2(30));
  3    type arr is table of ele index by pls_integer;
  4    v_arr  arr;
  5    v_ele  ele;
  6  begin
  7    for i in 1..5 loop
  8      v_ele.a := i;
  9      v_ele.b := lpad('x', i, 'x');
 10      v_arr(i) := v_ele;
 11    end loop;
 12    for i in 1..5 loop
 13      dbms_output.put_line(v_arr(i).a || ',' || v_arr(i).b);
 14    end loop;  
 15  end; 
 16  /
1,x
2,xx
3,xxx
4,xxxx
5,xxxxx

PL/SQL procedure successfully completed.