Instantiating an Array in Java

To instantiate an array in Java, we need to allocate memory for the array and define its size. This can be done using the 'new' keyword followed by the data type of the array and the size of the array.

Explanation of the Correct Answer (Option C)

The correct way to instantiate an array in Java is:
`int arr[] = new int[3];`

Here's an explanation of each part of the statement:

1. int arr[]:
- This is the declaration of the array variable 'arr'.
- 'int' specifies the data type of the elements in the array.
- 'arr[]' is the name of the array.

2. new int[3]:
- This part allocates memory for the array and defines its size.
- 'new' is a keyword used to create an object.
- 'int' specifies the data type of the elements in the array.
- '[3]' indicates that the array will have three elements.

Detailed Explanation

The statement `int arr[] = new int[3];` can be broken down into two parts:

1. Declaration:
- `int arr[]` declares an array variable named 'arr'.
- The square brackets '[]' indicate that 'arr' is an array.
- 'int' specifies that the elements in the array are of type 'int'.

2. Instantiation:
- `new int[3]` creates and allocates memory for the array.
- 'new' is a keyword used to create an object.
- 'int' specifies the data type of the elements in the array.
- '[3]' indicates that the array will have three elements.

After the array is instantiated, it can be accessed using the variable 'arr'. The elements of the array can be accessed using indexing, where the index starts from 0. For example, `arr[0]` refers to the first element of the array, `arr[1]` refers to the second element, and so on.

Summary

In Java, to instantiate an array, we need to declare an array variable and allocate memory for the array using the 'new' keyword followed by the data type of the elements and the size of the array. The correct syntax to instantiate an array of integers with three elements is `int arr[] = new int[3];`.