Visual Basic Programming Code Examples Visual Basic > Code Snippets Code Examples Factorial function Factorial function Public Function Factorial(ByVal Factor As Byte) As Variant On Error GoTo ErrorHandler If Factor = 0 Then Factorial = 1 Else Factorial = Factor * Factorial(Factor - 1) End If Exit Function ErrorHandler: MsgBox Err.Description End Function Private Sub Form_Load() MsgBox Factorial(3) End Sub