Composite Check

import java.util.Scanner;

public class Main {
    private static boolean isComposite(int n) {
        if (n <= 3) return false;
        for (int i = 2; i * i <= n; i++) {
            if (n % i == 0) return true;
        }
        return false;
    }

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.print("Enter a number: ");
        int n = sc.nextInt();

        if (isComposite(n)) {
            System.out.println(n + " is Composite");
        } else {
            System.out.println(n + " is not Composite");
        }
        sc.close();
    }
}