Here is such a UDF...
Code:
Function NoDigits(S As String) As String
Dim X As Long
NoDigits = S
For X = 0 To 9
NoDigits = Replace(NoDigits, X, "")
Next
End Function
HOW TO INSTALL UDFs
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If you are new to UDFs, they are easy to install and use. To install it, simply press ALT+F11 to go into the VB editor and, once there, click Insert/Module on its menu bar, then copy/paste the above code into the code window that just opened up. That's it.... you are done. You can now use NoDigits just like it was a built-in Excel function. For example,
=NoDigits(A1)