A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.
On the other hand, a composite number is a natural number greater than 1 that is not a prime number.
For example, 5 is prime, as only 1 and 5 divide it, whereas 6 is composite, since it has the divisors 2 and 3 in addition to 1 and 6.
Write a java method is PrimeNum that takes the number n, and checks whether the number is prime or composite.
The method should print at the end a message that indicates whether n is prime or composite.