Question

1) Declare an ArrayList named numberList that stores objects of Integer type. Write a loop to assign first 11 elements values: 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024. Do not use Math.pow method. Assign first element value 1. Determine each next element from the previous one in the number List. Print number List by using for-each loop.

Answer 1

Answer:

Explanation:

The following is written in Java and uses a for loop to add 10 elements to the ArrayList since the first element is manually added as 1. Then it calculates each element by multiplying the previous element (saved in count) by 2. The program works perfectly and without bugs. A test output can be seen in the attached image below.

import java.util.ArrayList;

class Brainly {

   public static void main(String[] args) {

       ArrayList<Integer> numberList = new ArrayList<>();

       numberList.add(0, 1);

       int count = 1;

       for (int i = 1; i < 11; i++) {

           numberList.add(i, (count * 2));

           count = count * 2;

       }

       for (Integer i : numberList) {

           System.out.println(i);

       }

   }

}