Using number as bind varilable in PLSQL block

Question

Hello, I need to use number for below bind variable. How can i achieve this? I am not in the situation that i can not use apha numeric vailable.
Any help is appreciated.
SQL> set serveroutput on
SQL> declare
2 var 1 varchar2(20);
3 var 2 varchar2(20);
4 exec :1 := 100
5 exec :2 := 200
6 begin
7 select count(*) into v_cnt from temptable where no = :1 or no = :2;
8 dbms_output.put_line(v_cnt);
9 end;
10 /
SP2-0552: Bind variable "2" not declared.
SQL>

Answer 1

>
Hello, I need to use number for below bind variable. How can i achieve this? I am not in the situation that i can not use apha numeric vailable.
>
I have no idea what you are saying. You say you 'need to use number' but hen say that you 'can not use apha numeric'. That doesn't make any sense.
You only wrote 11 lines altogether and only half of them are correct.
SQL> set serveroutput on
SQL> declare
2 var 1 varchar2(20);
3 var 2 varchar2(20);
4 exec :1 := 100
5 exec :2 := 200
6 begin
7 select count(*) into v_cnt from temptable where no = :1 or no = :2;
8 dbms_output.put_line(v_cnt);
9 end;
10 /#2 and #3 are wrong for two reasons. First because you put them AFTER the declare and you need to put them before it. They are sql*plus declarations. Second because var names cannot begin with a number.
#4 and #5 are wrong for two reasons. First the assignments need to go AFTER the BEGIN statement. Second you dont' use 'exec' you just assign the value.
#7 is wrong because you never declare 'v_cnt' any where.
If you correct ALL of the above it should work. Don't have your table so can't test.
set serveroutput on
var a varchar2(20);
var b varchar2(20);
declare
v_cnt number;
begin
:a := 100;
:b := 200;
select count(*) into v_cnt from temptable where no = :a or no = :b;
dbms_output.put_line(v_cnt);
end;
/