Android Question Find closest match between 2 numbers ?

Abs(SplitLine(0) - SplitLine(1))

Sub btnSearch_Click
    Dim p1_x, p1_y, distanceNew As Float
    Dim distanceShortest As Float = Power(10, 38) ' Largest positive flosting point number possible (I think)
    Dim intIndex As Int
    Dim a As Float = "4516.33696"
    Dim b As Float = "1850.84114"

    txt2.Text = ""
    txt3.Text = ""
    txt4.Text = ""
    txt5.Text = ""

    ' I'm taking a guess that these values will be static whilst looping through the list!!!
    Dim p2_x As Float = a 'txtLat.Text
    Dim p2_y As Float = b 'txtlon.Text

    For i = 0 To MyList.Size - 1
        Dim Line As String = MyList.Get(i)
        Dim SplitLine() As String = Regex.Split(";", Line.Replace(":", ""))
     
        p1_x = SplitLine(0)
        p1_y = SplitLine(1)

        distanceNew = Power(p1_x - p2_x, 2) + Power(p1_y - p2_y, 2) ' I had to look up how to use to the power of a number :-)
        Log("dist = " & distanceNew & " shortest=" & distanceShortest)
        If distanceNew < distanceShortest Then
            distanceShortest = distanceNew
            intIndex = i
            Log("New shotest distance found... " & distanceShortest & " at index position " & intIndex)
        End If
    Next

    Log("###### Shortest distance found at index " & intIndex)
End Sub

distanceNew = Abs(p1_x - p2_x) + Abs(p1_y - p2_y)

V = (Vx^2 + Vy^2)^(1/2)