Question

using visual basic

how would i go about coding:
if checkbox 1 is checked add 10 to subtotal

if checkbox 2 is checked add 50 to subtotal

if checkbox 3 is checked add 100 to subtotal

subtotal label is 'lblSubtotal'

all 3 boxes are independent.
example if checkboxes 1 and 3 are checked 110 would be added to subtotal.

Answer 1

Program

Public Class Form1

    'Declare a variable Subtotal

    Dim Subtotal As Integer = 0

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

    End Sub

    Private Sub chk10_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles chk10.CheckedChanged

        'Checking Checkbox1 is checked or not

        If chk10.Checked = True Then

            Subtotal = 10 'add 10 to Subtotal

            lblSubtotal.Text = Convert.ToString(Subtotal)

        End If

    End Sub

    Private Sub chk50_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles chk50.CheckedChanged

        'Checking Checkbox2 is checked or not

        If chk50.Checked = True Then

            Subtotal = Subtotal + 50 'add 50 to Subtotal

            lblSubtotal.Text = Convert.ToString(Subtotal)

        End If

    End Sub

    Private Sub chk100_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles chk100.CheckedChanged

        'Checking Checkbox3 is checked or not

        If chk100.Checked = True Then

            Subtotal = Subtotal + 100 'add 100 to Subtotal

            lblSubtotal.Text = Convert.ToString(Subtotal)

        End If

    End Sub

End Class

Output Screenshot