Checks the type of value and returns True or False depending on whether the value refers to a number.
expression A variable that represents a WorksheetFunction object.
|Arg1||Required||Variant||Value - the value that you want tested. Value can be a blank (empty cell), error, logical, text, number, or reference value, or a name referring to any of these, that you want to test.|
The value arguments of the IS functions are not converted. For example, in most other functions where a number is required, the text value 19 is converted to the number 19. However, in the formula
ISNUMBER("19"), 19 is not converted from a text value, and the IsNumber function returns False.
The IS functions are useful in formulas for testing the outcome of a calculation. When combined with the IF function, they provide a method for locating errors in formulas.
The following example illustrates the use of the IsNumber method:
Sub ArabicToRoman() Dim rng As Range On Error Resume Next Selection.Value = Selection.Value For Each rng In Selection If WorksheetFunction.IsNumber(rng) Then rng.Value = WorksheetFunction.Roman(rng) End If Next rng End Sub