In some situations we have to generate Random
numbers in our VB.NET applications for different purposes. In these situations
we have to use Random Class for generating the Random numbers. The Random Class
in VB.NET
represents a pseudo-random number generator, a device that produces a sequence of numbers that meet certain statistical requirements for randomness.
represents a pseudo-random number generator, a device that produces a sequence of numbers that meet certain statistical requirements for randomness.
Shared random As New Random()
The Next() method in Random class returns a
nonnegative random number.
random.Next()
We can limit the generation of Random number by
giving a specified range to Next() method.
random.Next(10,20)
The above code limit to generate the Random number
within the range from 10 to 20.
To improve performance, create one Random object to
generate many random numbers over time, instead of repeatedly creating a new
Random objects to generate one random number. The following VB.NET program
generate Random numbers within the specified rand from 10 to 20.
Public
Class Form1
Shared random As New Random()
Private Sub Button1_Click(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim i As Integer
For i = 0 To 5
MsgBox(Convert.ToString(random.Next(10, 20)))
Next
End Sub
End Class
