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
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