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]);
        //!!: it doesn't need the empty parenthesis after .length @@ NO .length()
        System.out.println("\nThe initial array ... ");
        int i = 0;
        while (i < primes.length) {
            System.out.println(primes[i]);
            i = i +1;
        }

        //What the heck is this? Is that a loop?
        int temp = primes[0];
        primes[0] = primes[primes.length -1 ];
        primes[primes.length -1 ] = temp;

        //the same loop as like the initial array
        System.out.println("\nThe final array...");
        for(int x = 0; x<primes.length;x=x+1) {
            System.out.println(primes[x]);
        }

        /********************************************************************
        /* I think those three chunks of commands represent the same loop, but
        /*... in three different way
        /********************************************************************/

    }

}