Question:

Consider the following code snippet:

public class ArrayExample {
   public static void main(String[] args) {
      int[] numbers = new int[5];
      for (int i = 0; i < numbers.length; i++) {
         numbers[i] = i * 2;
      }
      System.out.println(numbers[3]);
   }
}

What will be the output of the above code?

a) 0 b) 6 c) 3 d) 4

Explain your answer.

Answer:

The correct answer is b) 6.

Explanation:

The code snippet declares and initializes an integer array numbers with a size of 5 using the statement int[] numbers = new int[5];.

The following for loop for (int i = 0; i < numbers.length; i++) iterates through the array and assigns a value to each element using the expression numbers[i] = i * 2;. This means the first element of the array will have a value of 0, the second element will have 2, the third element will have 4, the fourth element will have 6, and the fifth element will have 8.

Finally, the code snippet prints the value of numbers[3] using System.out.println(numbers[3]);. Since array indices start from 0, numbers[3] corresponds to the fourth element of the array, which is 6. Hence, the output will be 6.