Input
Output
public class PrimeCheck { public static void main(String[] args) { // Manually assigned number int number = 7; System.out.println("Enter a number: " + number); boolean isPrime = true; // 0 and 1 are not prime numbers if (number <= 1) { isPrime = false; } else { // Check from 2 to sqrt(number) for (int i = 2; i <= Math.sqrt(number); i++) { if (number % i == 0) { isPrime = false; break; } } } // Display result if (isPrime) { System.out.println(number + " is a Prime number."); } else { System.out.println(number + " is NOT a Prime number."); } } }