/*
 * This program demonstrates the use of nested while loops and break.
 */
class Primes {
    /*
     * This program prints all primes <= n where n is the number entered by
     * the user as a command line argument.
     */
    public static void main(String[] args) {
        int limit = Integer.parseInt(args[0]);
        int n = 2;
        while (n <= limit) {
            boolean isPrime = true;
            int d = 2;
            while (d <= n-1) {
                if (n % d == 0) {
                    isPrime = false;
                    break;
                }
                d++;
            }
            if (isPrime)
                System.out.println(n);
            n++;
        }
    }
}