Skip to main content

Introduction of Arrays

An array is a linear data structure which stores collection of data in a contagious memory location. The idea is to store the collection of the same type of data. this makes it easier to calculate the position of each item by simply adding an offset to a base value.

In the above image of an array, we can identify each element by its index.

we can declare an array by specifying the types of its element.

type [] arrayname;

Types of Arrays

  • single dimensional arrays
  • Multidimensional arrays

Single Dimensional Arrays

A single dimensional array can be declared in the following way.

int[] array = new int[5];

this array will contain the element from array[0] to array[4].the new operator will initialize 
each element of this array with zero.
An array which contains string value can be declared the same way.

string[] array = new string[6];

Array Initialization

we can also initialize an array while declaration. For example

int[] array1 = new int[] { 1, 3, 5, 7, 9 };

In the same way, we can also initialize a string array.

string[] weekDays = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };

Multidimensional Arrays

Arrays can have more than one dimension. For example.
int[,] array = new int[6, 3];
the above declaration creates a two-dimensional array of six rows and three columns.

The following declaration creates an array of three dimensions, 6, 3, and 2.
int[, ,] array1 = new int[6, 3, 2];

Array Initialization

we can initialize the array upon declaration.For example
// Two-dimensional array.
int[,] array2D = new int[,] { { 1, 2 }, { 3, 4 }, { 5, 6 }, { 7, 8 } };
// The same array with dimensions specified.
int[,] array2Da = new int[4, 2] { { 1, 2 }, { 3, 4 }, { 5, 6 }, { 7, 8 } };

// Three-dimensional array.
int[, ,] array3D = new int[,,] { { { 1, 2, 3 }, { 4, 5, 6 } }, { { 7, 8, 9 }, { 10, 11, 12 } } };
// The same array with dimensions specified.
int[, ,] array3Da = new int[2, 2, 3] { { { 1, 2, 3 }, { 4, 5, 6 } }, { { 7, 8, 9 }, { 10, 11, 12 } } };
Happy Programmig :)



Comments

Popular posts from this blog

How to use ASP.NET AJAX UpdateProgress Control

Some time we have a method which takes a bit more time to execution.Due to this time consumption user get impatient One of  Ajax control solved this problem which is ASP.NET AJAX Update Progress Control. ASP.NET AJAX Update Progress Control provides status information about page updates. Here I am going to explain how to use ASP.NET AJAX Updated Progress Control in a web page. Firstly we need a animated GIF.I am using the following image.  In case of Visual studio 2005 install AjaxControlToolkit and in case of Visual studio 2010 add AjaxControlToolkit.dll in the project. Firstly we have to add scriptmanger inside the form tag.   <asp:ScriptManager ID="ScriptManager1" runat="server" />  And Use updatePanel because we need partial update of page. And drag updateProgress from toolbox to the page.                                      After that page will b...

ASP.NET MVC 5 (Part 1)

This tutorial teaches you the basics of building an ASP.NET MVC 5 web app using  Visual Studio 2017 . Get started Start by installing Visual Studio 2017. You can  Install Visual Studio 2017 community version which is free. Open Visual Studio,  Instead of selecting  New Project  on the  Start page , you can use the menu bar and select  File  >  New Project . Your first app On the  Start page , select  New Project . In the  New Project  dialog box, select the  Visual C#  category on the left, then  Web , and then select the  ASP.NET Web Application (.NET Framework)  project template. Name your project "MVCProject" and then choose  OK . In the  New ASP.NET Web Application  dialog, choose  MVC  and then choose  OK . The visual studio used the default template for the project you just created.you have a running applicat...