How do you run procedure with declare on sql plus

Question

Hi i am a newbie in sqlplus so please forgive if my question sounds to0 silly as i was watching a tutorial on sqlplus procedures i know how to run a simple IN procedure like
create or replace procedure inparameter
p_name IN VARCHAR2
)AS
BEGIN
DBMS_OUTPUT.PUT_LINE('Hello' || p_name);
end;
to run
start inparameter;
procedure created
set serveroutput on;
exec inparameter ('newbie');
hello newbie
procedure successfuly completed
but now i have a procedure with a declare
now wich from what i see on the video tutorial as two box to create procedure and on the next the declare i dont know if i am meant to put them together and run it as one this how it looks like
DO I RUN THE FIRST BOX AS MY PREVIOUS PROCEDURE DESCRIBED ABOVE (start procedure, then exec procedure)
then run the second box which is the declare as the same way or do i put the all code in one single box (start declare then exec declare)
BOX 1
Create or replace procedure addition
P_A IN NUMBER
,P_B IN NUMBER
,P_C OUT NUMBER
)AS
BEGIN
P_C := P_A +P_B;
END ADDITION
BOX 2
declare
x number;
addition (5,5,x);
dbms_output.put_line('the result is' || x);
end;
the tutorial can be seen on this youtube link
[http://www.youtube.com/watch?v=Vvn30o_ctpk&feature=related]
fastforward to about 9mins 18 to see the boxes that i mean
sorry in advance if its a stupid question

Answer 1

You have to create the first procedure (addition), then run the pl/sql block:
SQL> Create or replace procedure addition
  2  (
  3  P_A IN NUMBER
  4  ,P_B IN NUMBER
  5  ,P_C OUT NUMBER
  6  )AS
  7  BEGIN
  8  P_C := P_A +P_B;
  9  END ADDITION;
10  /
Procedure created.
SQL> declare
  2  x number;
  3  begin
  4  addition (5,5,x);
  5  dbms_output.put_line('the result is' || x);
  6  end;
  7  /
the result is10
PL/SQL procedure successfully completed.The procedure is stored in the database, the pl/sql block is anonymous, it's not stored in the db.
Max