Write a C program to check whether the integer n is a prime number. You can assume that n $>1.$

The output of your program should have the following format.

If n is a prime number $($e$.$g$.$ n $=3)$:

$3$ is a prime number.

If a number is not a prime number $($e$.$g$.$ n $=4)$:

$4$ is not a prime number.