VB.net Average of 3 numbers two different ways. Beginners question.

Question

I have a form that has 3 text boxes for 3 input values, along with a list box for output. I need the user to be able to input 3 different numbers and click a button to find the average. I'm not really sure how to do/approach this. Any help is greatly appreciated.

Still Stuck....

Private Sub btnAverage_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)     
Handles btnAverage.Click
    Dim a As Integer = CInt(txtone.Text)
    Dim b As Integer = CInt(txtTwo.Text)
    Dim c As Integer = CInt(txtThree.Text)
    Dim average As Integer
    average = (a + b + c) / 3
    lstOutput.Text = average

Answer 1

protected sub on_btn_click()

listbox1.items.add(new listitem((integer.parse(textbox1.text) + integer.parse(textbox2.text) + integer.parse(textbox3.text)) / 3 ))

end sub

Answer 2

Are you unsure about how to convert the input to numbers? If so use the CInt function.

Public Sub OnAverageClick(ByVal sender as Object, ByVal e As EventArgs) Handles AverageButton.Click

    Dim input1 as Integer = CInt(textBox1.Text)
    Dim input2 as Integer = CInt(textBox2.Text)
    Dim input3 as Integer = CInt(textBox3.Text)
    Dim average = (input1 + input2 + input3) / 3

End Sub

Answer 3

@JaredPar

I would use Integer.TryParse instead.