Array is a fixed number of variables for a particular type.
An array is denoted with square brackets after the element type.
All arrays inherit from the System.Array class.
For example, the following code declares an array of 5 characters:
char[] vowels = new char[5];
Square brackets index the array, accessing a particular element by position:
vowels[0] = 'a'; vowels[1] = 'e'; vowels[2] = 'i'; vowels[3] = 'o'; vowels[4] = 'u'; Console.WriteLine (vowels[1]); // e
Array indexes start at 0.
We can use a for loop statement to iterate through each element in the array.
The for loop in the following code iterates from 0 to 4:
for (int i = 0; i < vowels.Length; i++) Console.Write (vowels[i]); // aeiou
Length property of an array returns the number of elements in the array.
Once an array is created, its length cannot be changed.