sample2

gistfile1.txt

public class Sample2 {

    public static void main(String[] args) {
        int number = 17;

        System.out.println(imperative(number));
        System.out.println(declarative(number));
    }

    public static boolean imperative(int number) {

        for (int i = 2; i < number / 2; i++) {
            if (number % i == 0) {
                return true;
            }
        }
        return false;
    }

    public static boolean declarative(int number) {

        return IntStream.range(2, number / 2).filter(e -> number % 2 == 0).findFirst().orElse(-1) != -1;

    }
}