Cookbook – VisualBasic.NET for Beginners – Chapter 22 : Random

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Visual Basic .NET (VB.NET) is a programming language that is widely used for building Windows desktop applications and web applications. It is an object-oriented language that is based on the popular Visual Basic language, but it has been enhanced with additional features and capabilities. In this article, we’ll take a look at how to use the concept of random in VB.NET for beginners.

The concept of random is used in programming when we want to generate random numbers or random events. In VB.NET, the random number generator is a built-in feature that can be used to generate random numbers. The random number generator is based on a mathematical algorithm that produces a sequence of numbers that appear to be random. These numbers can be used for a variety of purposes, such as generating random numbers for a game, or for creating random passwords.

To generate a random number in VB.NET, we can use the “Random” class. The Random class has a method called “Next” which generates a random number between a specified range. For example, if we want to generate a random number between 1 and 100, we would use the following code:

Dim rnd As New Random Dim randomNumber As Integer = rnd.Next(1, 101)

The Next method has several overloads, one of them allows you to set the seed of the generator, this can be useful in case you need to reproduce a specific sequence of random numbers.

Another way to use randomness in VB.NET is by generating random events. For example, if we want to create a game that randomly chooses a winner, we can use the random number generator to randomly select a player from a list of players. This can be done using the following code:

Dim players As New List(Of String) players.Add(“Player 1”) players.Add(“Player 2”) players.Add(“Player 3”)

Dim rnd As New Random Dim randomPlayer As String = players(rnd.Next(0, players.Count))

In this example, the random number generator is used to randomly select an index from the list of players. The selected index is then used to access the corresponding player in the list, and the player’s name is assigned to the “randomPlayer” variable.

Randomness can also be used to shuffle the elements of a list. For example, if we have a list of cards and we want to shuffle them, we can use the Fisher-Yates shuffle algorithm, which is a simple algorithm that can be used to shuffle the elements of a list in a random order.

In conclusion, randomness is an important concept in programming that can be used for a variety of purposes. In VB.NET, the Random class provides a simple and easy-to-use method for generating random numbers and random events. By understanding how to use the Random class, beginners can start to incorporate randomness into their VB.NET programs and create more interesting and dynamic applications.


Cookbook – VisualBasic.NET for Beginners – Chapter 22 : Random


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