text: create or replace package users as
    session_count int := 0;
    function get_count() return int; 
    procedure add(name varchar(100));
  end;
  
  create or replace package body users as
    function get_count() return int
    is
    begin
      return session_count;
    end; 
    procedure add(name varchar(100))
    is 
    begin
      session_count = session_count + 1;
    end;
  end;
  
  users.add('John');
  users.add('Sarah');
  users.add('Paul');
  print 'Number of users: ' || users.get_count();