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Tip of the Day
Language: VB7
Expertise: beginner
Jul 14, 2003



Application Security Testing: An Integral Part of DevOps

IsNumeric - Check whether an object is storing a numeric value

' Check whether an object is storing a numeric value
' Examples:
'    Dim s As String = "hello"
'    Dim d As Double = 2.4
'    Dim i As Integer = 5
'    Debug.WriteLine(IsNumeric(d))   ' => True
'    Debug.WriteLine(IsNumeric(s))   ' => False
'    Debug.WriteLine(IsNumeric(i))   ' => True

Function IsNumeric(ByVal val As Object) As Boolean
    Return TypeOf val Is System.Decimal OrElse TypeOf val Is System.Single _
        OrElse TypeOf val Is System.Double OrElse TypeOf val Is System.Int16 _
        OrElse TypeOf val Is System.Int32 OrElse TypeOf val Is System.Int64
End Function
Marco Bellinaso
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