declare
  rec banking%rowtype;
  amt float;
  ch int;
  cno banking.clientno%TYPE;
 BEGIN
  dbms_output.put_line('Enter the Client no');
  cno:='&cno';
  dbms_output.put_line('Enter the Choice(w1/d0)');
  ch:=&ch;
   select * into rec from banking where banking.clientno=cno;
  if ch=0  then
     dbms_output.put_line('Enter the amount to deposit');
     amt:=&amt;
     update banking set amount=amount+amt where banking.clientno=cno;
 end if;
  if ch=1  then
    dbms_output.put_line('Enter the Amount  to withdraw');
    amt:=&amt;
    if rec.amount-amt<500  then
            dbms_output.put_line('Insuff amount');
    else
            update banking set amount=amount-amt where banking.clientno=cno;
    end if;
  end if;
END;
/