import java.util.Scanner;

public class PrimeChecker {

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

System.out.println("Enter a number to check if it's prime:");

int number = input.nextInt();

boolean isPrime = true;

if (number <= 1) {

isPrime = false;

} else {

for (int i = 2; i <= Math.sqrt(number); 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.");

}

input.close();

}

}