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Leveraging on the mobile phone revolution

Mobile phones have revolutionized the society in a way that no one ever have done in the past. There are around seven billion people on earth and nearly six billion mobile phone subscribers. With affordable internet and with the rise of middle class around the globe more and more people are  using their mobile devices to browse the internet. Under these circumstances if you are not converting your website to a mobile or tablet friendly site then you will lose the competition.

What is a factorial?

A factorial is the result of an integer multiplied by all the integers less than it. For example if you want to know the factorial of 3 then it can be calculated as 3*2*1 = 6. So factorial of 3 is 6. Similarly factorial of 5 is 5*4*3*2*1 = 120. 

Note that factorial is always calculated for non-negative integers. So there is nothing like negative factorials. 

In Algebra an exclamatory symbol (!) is used as a factorial notation.

So if we want to calculate factorial of 5 then we can write it as below:
5! = 120. 

So how to find factorial of a number like 0? Answer is, factorial of 0 is always 1.

Recently I was going through few MSDN magazines and found some really useful articles for .NET developers. Although there are lot of valuable articles in MSDN magazines but I thought to create my own list of Top 10 that I think will be useful to .NET developers.

As described earlier, an array is used to store same type of data.

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Classification of Arrays

Arrays in C# can be classified as below:

• Single-Dimensional Arrays
• Multidimensional Arrays
• Jagged Arrays

Arrays with single dimension has been discussed in the earlier chapters of this tutorial. In this chapter we will discuss Multidimensional and Jagged arrays.

A C# Hashtable represents a collection in which objects are stored and retrieved using a key.

Each key in a Hashtable has a hash code using which the objects in a Hashtable are organized.

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Create a Hashtable in C#

A Hashtable can be created using the below code:

    Hashtable shoppingCart = new Hashtable();

Stack is a type of collection in which the item stored last is retrieved first. This behaviour is also called as LIFO i.e. Last In First Out.

Inserting an item into a Stack is called as Pushing and removing an item is called as Popping.

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Important features of C# Stack class

Below are some of the important features of a Stack class.

• Stack allows Null values.
• Stak allows duplicate values.
• It has both generic and non-generic versions.

Queue is a type of collection in which the item stored first is retrieved first. This behaviour is also called as FIFO i.e. First In First Out.

Inserting an item into a Queue is called as Enqueuing and removing an item is called as Dequeuing.

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Important features of C# Queue class

Below are some of the important features of a Queue class.

• Null values can be stored in Queue.
• Duplicate values can be stored in Queue.
• It has both generic and non-generic versions.