Using OUT Parameters In Procedure

Sql>  CREATE OR REPLACE PROCEDURE query_emp
 (id     IN  employees.employee_id%TYPE,
  name   OUT employees.last_name%TYPE,
  salary OUT employees.salary%TYPE) IS
BEGIN
  SELECT   last_name, salary INTO name, salary
   FROM    employees
   WHERE   employee_id = id;
END query_emp;


DECLARE
  emp_name employees.last_name%TYPE;
  emp_sal  employees.salary%TYPE;
BEGIN
  query_emp(171, emp_name, emp_sal);
  DBMS_OUTPUT.PUT_LINE(emp_name||' earns '||to_char(emp_sal, '$999,999.00'));
END;