Change it into something like:
Code:
create or replace procedure Emp_Procedure (p_empno in number)
AS
  v_ename emp.ename%TYPE;
begin
  select ename
  INTO v_ename
  from emp
  where empno = P_empno;
  dbms_output.put_line('this the employee I want to is ' ||' ' ||v_ename );
end;