Count Digits in VB.NET

  In this tutorial, I will show you how to write a program that will ask the user to give a series of 

numbers and then the program will count the digits in a given number using Visual Basic NET programming language.

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Program Listing

Public Class Form1

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

        Dim st_text As String

        st_text = TextBox1.Text

        Dim count As Integer = 0

        Dim i As Integer

        Dim arr() As Char = st_text.ToCharArray()

        For i = 0 To arr.Length - 1

            If Char.IsDigit(arr(i)) Then

                count = count + 1

            End If

        Next

        Label2.Text = "Number of digits : " & count

    End Sub

    Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click

        TextBox1.Text = ""

        Label2.Text = ""

        TextBox1.Focus()

    End Sub

End Class