Visual Basic 10 Scientific Calculator Code Extra Quality Jun 2026

Before coding the buttons, write these helper functions. They will be called repeatedly.

Private Sub btnFactorial_Click(sender As System.Object, e As System.EventArgs) Handles btnFactorial.Click Dim value As Integer = Integer.Parse(currentInput) If value >= 0 AndAlso value <= 20 Then currentInput = Factorial(value).ToString() Else currentInput = "Overflow/Invalid" End If newEntry = True UpdateDisplay() End Sub

Tip: In the Visual Studio properties window, you can set the Text property (what the user sees) and the Name property (how the code identifies the control).

Private Sub btn1_Click(...) Handles btn1.Click TextBox1.Text &= "1" End Sub Use code with caution. Copied to clipboard Visual Basic 10 Scientific Calculator Code

For this article, we will use a hybrid approach: and * Formula storage for binary operators (+, -, , /, ^) .

Private Sub btnAdd_Click(sender As Object, e As EventArgs) Handles btnAdd.Click txtDisplay.Text &= "+" End Sub

Scientific calculators usually perform these functions immediately on the number currently on screen. We don't need to store a "FirstNumber" for these; we just transform the current number. Before coding the buttons, write these helper functions

A scientific calculator cannot evaluate 2 + 3 * sin(30) by pressing equals after each button. It requires (PEMDAS/BODMAS). In VB10, there are two ways to handle this:

Private Sub UpdateDisplay() ' Limit display length to prevent overflow If currentInput.Length > 20 Then currentInput = currentInput.Substring(0, 20) End If txtDisplay.Text = currentInput End Sub

Use a single TextBox named txtDisplay (aligned right, ReadOnly = False). Name your buttons logically: btnSin , btnCos , btnLog , etc. Private Sub btn1_Click(

Private Sub btnExp_Click(sender As Object, e As EventArgs) Handles btnExp.Click Try Dim result As Double = Math.Exp(Convert.ToDouble(txtDisplay.Text)) txtDisplay.Text = result.ToString() Catch ex As Exception txtDisplay.Text = "Error" End Try End Sub

Private Sub btn9_Click(sender As Object, e As EventArgs) Handles btn9.Click txtDisplay.Text &= "9" End Sub