A positive whole number n > 2 is <EM>prime</EM> 
if no number between 2 and sqrt(n) (inclusive) evenly divides n.
Write a program that accepts a value of n as input
and determines if the value is prime.
If n is not prime, your program should quit as soon as it finds a value
that evenly divides n.

<HR>
The program may run as follows.
<PRE>
<CODE>
Please input a positive number -- <B>9</B>
9 is not a prime number.
</CODE>
</PRE>