Someone

public static void main(String[] args) throws Exception {
		BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
		
		System.out.println("Enter a number between 1 and 1000");
		int number = Integer.parseInt(input.readLine());
		if (n < 1 || n > 1000) {
			System.out.println("Number 1 < n < 1000");
		}
		System.out.println(isNumPrime(number));
	}