Bilangan Prima

public class Main {
    
  public static void main(String[] args) {
    int number = 1;
    boolean isPrime = true;
    
    for (int i = 2; i <= number / 2; i++) {
      if (number % i == 0) {
        isPrime = false;
        break;
      }
    }
    
    if (isPrime) {
      System.out.println(number + " is a prime number");
    } else {
      System.out.println(number + " is not a prime number");
    }
  }
}