MYDBA@ORCL > 
MYDBA@ORCL > create type vcarray is table of varchar2(30);
  2  /

Type created.

MYDBA@ORCL > 
MYDBA@ORCL > create procedure test(v vcarray)
  2  is
  3  begin
  4  	     dbms_output.put_line(v(1));
  5  end;
  6  /

Procedure created.

MYDBA@ORCL > 
MYDBA@ORCL > create procedure test2(v vcarray)
  2  is
  3  begin
  4  	     for i in v.first .. v.last loop
  5  		     dbms_output.put_line(v(i));
  6  	     end loop;
  7  end;
  8  /

Procedure created.

MYDBA@ORCL > 
MYDBA@ORCL > declare
  2  	     l_array vcarray := vcarray('Hello','out','there');
  3  begin
  4  	     test(l_array);
  5  
  6  	     l_array(1) := 'Goodbye';
  7  	     test(l_array);
  8  
  9  	     test2(l_array);
 10  end;
 11  /
Hello
Goodbye
Goodbye
out
there

PL/SQL procedure successfully completed.

MYDBA@ORCL > 
MYDBA@ORCL > drop procedure test;

Procedure dropped.

MYDBA@ORCL > drop procedure test2;

Procedure dropped.

MYDBA@ORCL > drop type vcarray;

Type dropped.

MYDBA@ORCL > 
MYDBA@ORCL > set echo off;