/* 
 * Program using an array of prime numbers 
 */

package arrayplay;

public class Primes {
    public static void main(String[] args){
        int[] primes = new int[4];

        primes[0] = 2;
        primes[1] = 3;
        primes[2] = 5;
        primes[3] = 7;

        System.out.println("length of primes array = " + primes.length);
        System.out.println("first prime = " + primes[0]);
        System.out.println("last prime = " + primes[3]);
        System.out.println("last prime = " + primes[primes.length-1]);

        System.out.println("\nThe initial array ...");
        int i = 0;
        while ( i < primes.length ) {
            System.out.println(primes[i]);
            i = i + 1;
        }

        int temp = primes[0];
        primes[0] = primes[primes.length-1];
        primes[primes.length-1] = temp;

        System.out.println("\nThe final array ...");
        for ( int x = 0; x < primes.length; x = x + 1){
            System.out.println(primes[x]);
        }
    }
}