///John Mulligan ///period 5 ///Program Name: PrimeNumber ///File Name: PrimeNumber.java public class PrimeNumber { public static void main( String[] args ) { for ( int n = 1; n <= 20; n++ ) { if (isPrime(n)) { System.out.println( n + " <"); } else { System.out.println( n ); } } } public static boolean isPrime (int n ) { for (int x = 2; x < n;x++) { if (n%x == 0) { return false; } } return true; } }