C sharp - Array creation,declaration and initialization

In C#, an array is a data structure that holds a fixed number of values of the same type. 

1. Declaration

To declare an array, specify the type of elements followed by square brackets:

int[] numbers; // Declares an array of integers

This only declares the array variable — no memory is allocated yet.

2. Creation (Instantiation)

To create an array, use the new keyword:

numbers = new int[5]; // Creates an array of 5 integers

This creates memory space for 5 integers (default-initialized to 0).

3. Initialization

You can assign values to array elements one by one:

numbers[0] = 10;
numbers[1] = 20;
numbers[2] = 30;
numbers[3] = 40;
numbers[4] = 50;

Or, use declaration + initialization in one line:

int[] numbers = new int[] { 10, 20, 30, 40, 50 };

Or even shorter:

int[] numbers = { 10, 20, 30, 40, 50 };