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#1
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Check numeric char
Can anyone help with a formula/macro to check if a cell contains all numeric
characters only? in which only "," can be allowed and not even a space. |
#2
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Check numeric char
Try the below....returns TRUE if a number...
=ISNUMBER(--SUBSTITUTE(A1,",",)) -- Jacob (MVP - Excel) "Kash" wrote: Can anyone help with a formula/macro to check if a cell contains all numeric characters only? in which only "," can be allowed and not even a space. |
#3
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Check numeric char
If the cells actually contain a comma they will be NON numeric no matter how
numbers are in it. -- Regards Dave Hawley www.ozgrid.com "Kash" wrote in message ... Can anyone help with a formula/macro to check if a cell contains all numeric characters only? in which only "," can be allowed and not even a space. |
#4
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Check numeric char
I guess the OP lives in a country that uses the comma as decimal sign.
Because ISNUMERIC is localized it will happyly accept a comma in such a locale but will return false if there is a point! Helmut. "ozgrid.com" schrieb im Newsbeitrag ... If the cells actually contain a comma they will be NON numeric no matter how numbers are in it. -- Regards Dave Hawley www.ozgrid.com "Kash" wrote in message ... Can anyone help with a formula/macro to check if a cell contains all numeric characters only? in which only "," can be allowed and not even a space. |
#5
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Check numeric char
"Kash" schrieb im Newsbeitrag
... Can anyone help with a formula/macro to check if a cell contains all numeric characters only? in which only "," can be allowed and not even a space. Hmm, I assume your localized version of Excel is using the comma as decimal sign, right? Then how about negative values? BTW, the suggested IsNumeric will accept values like "543E12" or "120D4" as numeric if used in VBA. The Excel spreadsheet function with the same name however will return False in the second case (tested with Excel 97). Excel will recognize it as a number if I enter 123E4 into a cell and automatically convert it to 1.23E+06 (=1230000) using scientific notation. 123D4 however is treated as text and not recognized as scientific notation. Helmut. |
#6
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Check numeric char
BTW, the suggested IsNumeric will accept values like
"543E12" or "120D4" as numeric if used in VBA. Unfortunately, the IsNumeric function in VBA will accept a lot more than that as numeric! From a previous post of mine... I usually try and steer people away from using IsNumeric to "proof" supposedly numeric text. Consider this (also see note below): ReturnValue = IsNumeric("($1,23,,3.4,,,5,,E67$)") Most people would not expect THAT to return True. IsNumeric has some "flaws" in what it considers a proper number and what most programmers are looking for. Several years ago, I had a short tip published by Pinnacle Publishing in their Visual Basic Developer magazine that covered some of these flaws. Originally, the tip was free to view but is now viewable only by subscribers.. Basically, it said that IsNumeric returned True for things like -- currency symbols being located in front or in back of the number as shown in my example (also applies to plus, minus and blanks too); numbers surrounded by parentheses as shown in my example (some people use these to mark negative numbers); numbers containing any number of commas before a decimal point as shown in my example; numbers in scientific notation (a number followed by an upper or lower case "D" or "E", followed by a number equal to or less than 305 -- the maximum power of 10 in VB); and Octal/Hexadecimal numbers (&H for Hexadecimal, &O or just & in front of the number for Octal). NOTE: ====== In the above example and in the referenced tip, I refer to $ signs and commas and dots -- these were meant to refer to your currency, thousands separator and decimal point symbols as defined in your local settings -- substitute your local regional symbols for these if appropriate. As for your question about checking numbers, here are two functions that I have posted in the past for similar questions..... one is for digits only and the other is for "regular" numbers: Function IsDigitsOnly(Value As String) As Boolean IsDigitsOnly = Len(Value) 0 And _ Not Value Like "*[!0-9]*" End Function Function IsNumber(ByVal Value As String) As Boolean ' Leave the next statement out if you don't ' want to provide for plus/minus signs If Value Like "[+-]*" Then Value = Mid$(Value, 2) IsNumber = Not Value Like "*[!0-9.]*" And _ Not Value Like "*.*.*" And _ Len(Value) 0 And Value < "." End Function Here are revisions to the above functions that deal with the local settings for decimal points (and thousand's separators) that are different than used in the US (this code works in the US too, of course). Function IsNumber(ByVal Value As String) As Boolean Dim DP As String ' Get local setting for decimal point DP = Format$(0, ".") ' Leave the next statement out if you don't ' want to provide for plus/minus signs If Value Like "[+-]*" Then Value = Mid$(Value, 2) IsNumber = Not Value Like "*[!0-9" & DP & "]*" And _ Not Value Like "*" & DP & "*" & DP & "*" And _ Len(Value) 0 And Value < DP End Function I'm not as concerned by the rejection of entries that include one or more thousand's separators, but we can handle this if we don't insist on the thousand's separator being located in the correct positions (in other words, we'll allow the user to include them for their own purposes... we'll just tolerate their presence). Function IsNumber(ByVal Value As String) As Boolean Dim DP As String Dim TS As String ' Get local setting for decimal point DP = Format$(0, ".") ' Get local setting for thousand's separator ' and eliminate them. Remove the next two lines ' if you don't want your users being able to ' type in the thousands separator at all. TS = Mid$(Format$(1000, "#,###"), 2, 1) Value = Replace$(Value, TS, "") ' Leave the next statement out if you don't ' want to provide for plus/minus signs If Value Like "[+-]*" Then Value = Mid$(Value, 2) IsNumber = Not Value Like "*[!0-9" & DP & "]*" And _ Not Value Like "*" & DP & "*" & DP & "*" And _ Len(Value) 0 And Value < DP End Function -- Rick (MVP - Excel) |
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