/*Array:-
C# supports single-dimensional arrays, multidimensional arrays (rectangular arrays), and array-of-arrays (jagged arrays).
To Declare:-
==========
Single-dimensional arrays:
int[] numbers;
Multidimensional arrays:
string[,] names;
Array-of-arrays (jagged):
byte[][] scores;
Declaring them does not actually create the arrays.In C#, arrays are objects and must be instantiated. The following examples show how to create arrays:
Single-dimensional arrays:
int[] numbers = new int[5];
Multidimensional arrays:
string[,] names = new string[5,4];
Array-of-arrays (jagged):
byte[][] scores = new byte[5][];
for (int x = 0; x < scores.Length; x++)
{
scores[x] = new byte[4];
}
Initializing Arrays
=============
Single-Dimensional Array
=====================
int[] numbers = new int[5] {1, 2, 3, 4, 5};
string[] names = new string[3] {"Matt", "Joanne", "Robert"};
You can omit the size of the array, like this:
int[] numbers = new int[] {1, 2, 3, 4, 5};
string[] names = new string[] {"Matt", "Joanne", "Robert"};
You can also omit the new operator if an initializer is provided, like this:
int[] numbers = {1, 2, 3, 4, 5};
string[] names = {"Matt", "Joanne", "Robert"};
Multidimensional Array
===================
int[,] numbers = new int[3, 2] { {1, 2}, {3, 4}, {5, 6} };
string[,] siblings = new string[2, 2] { {"Mike","Amy"}, {"Mary","Albert"} };
You can omit the size of the array, like this:
int[,] numbers = new int[,] { {1, 2}, {3, 4}, {5, 6} };
string[,] siblings = new string[,] { {"Mike","Amy"}, {"Mary","Albert"} };
You can also omit the new operator if an initializer is provided, like this:
int[,] numbers = { {1, 2}, {3, 4}, {5, 6} };
string[,] siblings = { {"Mike", "Amy"}, {"Mary", "Albert"} };
Jagged Array (Array-of-Arrays)
========================
You can initialize jagged arrays like this example:
int[][] numbers = new int[2][] { new int[] {2,3,4}, new int[] {5,6,7,8,9} };
You can also omit the size of the first array, like this:
int[][] numbers = new int[][] { new int[] {2,3,4}, new int[] {5,6,7,8,9} };
-or-
int[][] numbers = { new int[] {2,3,4}, new int[] {5,6,7,8,9} };
using foreach:-
=============
int[] numbers = {4, 5, 6, 1, 2, 3, -2, -1, 0};
foreach (int i in numbers)
{
System.Console.WriteLine(i);
}
*/
using System;
class DeclareArraysSample
{
public static void Main()
{
// Single-dimensional array
int[] numbers = new int[5];
// Multidimensional array
string[,] names = new string[5,4];
// Array-of-arrays (jagged array)
byte[][] scores = new byte[5][];
// Create the jagged array
for (int i = 0; i < scores.Length; i++)
{
scores[i] = new byte[i+3];
}
// Print length of each row
for (int i = 0; i < scores.Length; i++)
{
Console.WriteLine("Length of row {0} is {1}", i, scores[i].Length);
}
}
}
