Thinking About Using VBA's IsNumeric Function? Read this first.

[DocAElstein]

Thanks for these ideas, Rick. - I just thought I would mention that, as I passed this Blog post on just now, I saw in that Thread something that might be worth mentioning here in passing, which is that Hans offered an Excel Worksheet function alternative, Application.IsNumber( ) , which seems more likely to give results closer to what most people would expect.
If I understand correctly the main difference between the two functions can be thought of approximately as
IsNumeric( ) is True if it thinks it can convert the given text into a number, whereas
Application.IsNumber( ) is more likely to be True only if the passed thing looks like a number, ( it won't , for example . convert a text into a number, even anything simple like "2" )

That is just an approximate conclusion as I have not investigated thoroughly both functions yet…

The intelligence behind IsNumeric( ) is perhaps a different one to ours, and perhaps as a compromise for efficiency does not thoroughly check for correctness, but rather looks for some allowed characters that might be used in some number formats,
( and it allows a text that has a number format,
( whereas Application.IsNumber( ) doesn’t: For example Application.IsNumber("1") is false because "1" is text )
IsNumeric("1") is True)

Alan

( Edit P.S. I geuss you will need to be in Excel or else load the Excel library in order to use Application.IsNumber( ) )

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[Rick Rothstein]

Since you are doing this in VBA, the question of how you convert the text to a number becomes important. Consider these...

MsgBox Application.IsNumber(Val("OCT1"))

MsgBox Application.IsNumber(Val("12E34"))

I still like crafting (customizing) a solution using the Like operator myself.


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