Write a PL/SQL code block to find factorial of a number.

declare 

  

   n number(2);

   i number(2);
   p number(2):=1;

begin

   n:=&n;
   for i in 1..n loop
   p:=p*i;
  end loop;
  dbms_output.put_line(n ||' ! = '||p);
end;