ARRAY IN VB.NET

Arrays are using for store similar data types grouping as a single unit. We can access Array elements by its numeric index.

Dim week(6) As String

The above Vb.Net statements means that , an Array named as week declared as a String type and it can have the capability of seven String type values.

week(0) = "Sunday"

week(1) = "Monday"

In the above statement , we initialize the values to the String Array. week(0) = "Sunday" means , we initialize the first value of Array as "Sunday" ,

Dim weekName as String = week(1)

We can access the Arrays elements by providing its numerical index, the above statement we access the second value from the week Array.

In the following program , we declare an Array "week" capability of seven String values and assigns the seven values as days in a week . Next step is to retrieve the elements of the Array using a For loop. For finding the end of an Array we used the Length function of Array Object.

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Public Class Form1
    Private Sub Button1_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles Button1.Click
        Dim i As Integer
        Dim week(6) As String
        week(0) = "Sunday"
        week(1) = "Monday"
        week(2) = "Tuesday"
        week(3) = "Wednesday"
        week(4) = "Thursday"
        week(5) = "Friday"
        week(6) = "Saturday"

        For i = 0 To week.Length - 1
            MsgBox(week(i))
        Next

    End Sub
End Class

ArrayList is one of the most flixible data structure from VB.NET Collections. ArrayList contains a simple list of values and very easily we can add , insert , delete , view etc.. to do with ArrayList. It is very flexible becuse we can add without any size information , that is it grow dynamically and also shrink .