I have a stored procedure that accepts a date parameter and I have to check for a year they will enter 01/01/2000 and I have to check if the date is between 01/01/2000/12/31/2000 how can I create a variable that if they enter 01/01/2001 the it will create the value for the variable 12/31/2001 is the calculation that can be done to add to the date.

example
e_date in date%type,
v_date in varchar2
as
begin
open cur1 for
select
type,
date,
id
from t1, t2
where t1.date between e_date and v_date