Arrays

In the C# programming language, arrays are one of the basic data types that allow you to store collections of elements of the same type.


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// fruits - an array of string elements
string[] fruits = new string[] { "apple", "banana", "cherry" };
// numbers - an array of int elements
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Declaring an array

Declaration is the process of creating a variable, defining its type and name.


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// type[] arrayName;
int[] numbers;
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Initialization

Initialization is the process of assigning an initial value to a variable.


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int[] numbers;
// initializing an array with a specified size
numbers = new int[5]; // an array of 5 int elements
// declaration and initialization at the same time
int[] numbers = new int[5];
// initialization with assigned values
int[] numbers = new int[] { 1, 2, 3, 4, 5 };
// or shorter syntax
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Reading array elements

Array elements are accessed by index, starting from 0.


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int[] numbers = { 1, 2, 3, 4, 5 };
// getting the first element
int firstNumber = numbers[0];
Console.WriteLine(firstNumber);
// getting the second element
int secondNumber = numbers[1];
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Changing array elements


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int[] numbers = { 1, 2, 3, 4, 5 };
// getting and printing the first element
Console.WriteLine(numbers[0]);
// changing the first element
numbers[0] = 11;
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Exercises

Create and print an array of three movies you recently watched.


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Replace the last movie in this array with your favorite one and print the modified array.


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Create and print an array of seasons: winter, spring, summer, autumn.


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What is your favorite season? Change that array element, for example: summer is my favorite season. Print the modified array.


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