User input in a loop

Question

Hi,
I am trying to write a script where by a user will be prompted to enter a new value each time it loops. So far, the script only prompts me once and the it keeps using the same value over and over again instead of prompting me to insert new value.
How can i fix this. My script is below.
declare
v_count number(2):=1;
v_compno number(10);
begin
loop
select compid into v_compno from amos.componentunit
where compno=&compno;
dbms_output.put_line(v_compno);
v_count:=v_count +1;
exit when v_count=10;
end loop;
end;
Thanks in advance.

Answer 1

The '&compno' is a element of SQL*Plus, is not a element of PL/SQL.
On the other hand , the loop is a syntax element of PL/SQL,
SQL*Plus has no corresponding command.
Sorry, I have no idea.
But, can you try this?
SQL> set serverout on
SQL> declare
  2    v_count number(2):=1;
  3  begin
  4    for p in (select ename,deptno from scott.emp
  5               where ename in (&ename)) loop
  6      dbms_output.put_line(p.ename||' belongs '||p.deptno);
  7      v_count:=v_count +1;
  8      exit when v_count=10;
  9    end loop;
10  end;
11  /
Enter value for ename: 'SCOTT','KING'
old   5:              where ename in (&ename)) loop
new   5:              where ename in ('SCOTT','KING')) loop
SCOTT belongs 20
KING belongs 10
PL/SQL procedure successfully completed.