FACTORIAL PLSQL

PL/SQL code to find factorial of a number entered by user 

DECLARE 

   num number;    factorial number;     FUNCTION fact(x number) RETURN number  IS    f number; BEGIN  f := 1;  for i in 1..x loop    f := f*i;     end loop;RETURN f; END;  
BEGIN    num:= &enter_number;  -- to take input from user   factorial := fact(num);    dbms_output.put_line(' Factorial of '|| num || ' is ' || factorial); END;