How can I multiplicate two arrays in a way that the first value of arrayA multiply the last value of arrayB?

public static void main(String[] args) throws IOException {
    int numbersA[] = new int[5];
    int numbersB[] = new int[5];
    int numbersC[] = new int[5];

    for (int i = 0; i < numbersA.length; i++) {
        System.out.print("Please insert a number for the first array: ");
        numbersA[i] = Integer.parseInt(in.readLine());
    }
    System.out.println(Arrays.toString(numbersA));

    for (int i = 0; i < numbersB.length; i++) {
        System.out.print("Please insert a number for the second array: ");
        numbersB[i] = Integer.parseInt(in.readLine());
    }
    System.out.println(Arrays.toString(numbersB));

    System.out.print("The multiplication of the two arrays (the first one with the last one and consecutively) are: ");
    for (int i = 0; i < numbersC.length; i++) {
        numbersC[i] = numbersA[i] * numbersB[(numbersB.length) - 1 - i];
    }
    System.out.println(Arrays.toString(numbersC));
}

}

Solution

Your first element(i.e. index 0) of numbersA[ ] should be multiplied by last element(i.e. index 9) of numbersB[ ] array. Similarly second element(i.e. index 1) of numbersA[ ] should be multiplied by second last element(i.e. index 8) of numbersB[ ]. Like shown below:

public static void main(String... ars) {

    System.out.println("enter the length of arrays");
    Scanner sc = new Scanner(System.in);

    int len = sc.nextInt();


    int numbersA[] = new int[len];
    int numbersB[] = new int[len];
    int numbersC[] = new int[len];

    Random rand = new Random();

    System.out.println("enter the values of first array");
    for (int i = 0; i < numbersA.length; i++) {
        numbersA[i] = sc.nextInt();
    }
    System.out.println(Arrays.toString(numbersA));

    System.out.println("enter the values of second array");
    for (int i = 0; i < numbersB.length; i++) {
        numbersB[i] = sc.nextInt();
    }

    System.out.println(Arrays.toString(numbersB));


    out.println("The multiplication of the two arrays (the first one with the last one and consecutively) are: ");
    for (int i = 0; i < numbersC.length; i++) {
        numbersC[i] = numbersA[i] * numbersB[(numbersB.length)-1-i];
    }

    System.out.println(Arrays.toString(numbersC));
}