import java.util.Scanner;
import java.util.Scanner;
public class PrimeExample3 {
public static void main(String[] args) {
Scanner s = new Scanner(System.in);
System.out.print("Enter a number : ");
int n = s.nextInt();
if (isPrime(n)) {
System.out.println(n + " is a prime number");
} else {
System.out.println(n + " is not a prime number");
}
}
public static boolean isPrime(int n) {
if (n <= 1) {
return false;
}
for (int i = 2; i < Math.sqrt(n); i++) {
if (n % i == 0) {
return false;
}
}
return true;
}
}