Excel loop

Hi,

Is there a way to enhance the code EE helped me by looking at specific columns.
https://www.experts-exchange.com/questions/29120476/formatting-data.html
Sub FormatDate()
    Dim cel As Range
    
    For Each cel In Range("A2:C" & ActiveSheet.UsedRange.Rows.Count)
        If InStr(1, cel.Text, ".") = 0 And InStr(1, cel.Text, ",") = 0 Then
            If Len(cel.Value2) > 5 Then
                If Not IsDate(cel.Value2) Then
                    cel = Left$(cel.Value2, 4) & "/" & Mid$(cel.Value2, 5, 2) & "/" & Right$(cel.Value2, 2)
                End If
            End If
            cel.NumberFormat = "mm/dd/yyyy"
        End If
    Next
    
End Sub

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I just found out there are just way too many columns I need to check.
E, H, K, U, V, AC, AP, AQ, AR, BF, BM...................

Is there a way to loop through those columns?
thanks
mcrmgAsked:
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Martin LissOlder than dirtCommented:
Dim rng As Range
Dim lr As Long

lr = ActiveSheet.UsedRange.Rows.Count
Set rng = Union(Range("A2:A" & lr), Range("H2:H" & lr), Range("K2:K" & lr), Range("U2:U" & lr)) 'ETC
For Each cel In rng
...
Next

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Martin LissOlder than dirtCommented:
I corrected line 5
Martin LissOlder than dirtCommented:
Or...
Dim lr As Long
Dim varCols As Variant
Dim intCol As Integer

varCols = Array("A", "H", "K", "U") ' ETC

lr = ActiveSheet.UsedRange.Rows.Count

For intCol = 0 To UBound(varCols) - 1
    For Each cel In Range(varCols(intCol) & "2:" & varCols(intCol) & lr)
    '...
    Next
Next

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mcrmgAuthor Commented:
Have to fix my boss's pc now....I will close the question now. and post back. thank you
mcrmgAuthor Commented:
thanks
Martin LissOlder than dirtCommented:
I could have waited until you tested so let me know if there are problems, but in any case you’re welcome and I’m glad I was able to help.

If you expand the “Full Biography” section of my profile you’ll find links to some articles I’ve written that may interest you.

Marty - Microsoft MVP 2009 to 2017
              Experts Exchange Most Valuable Expert (MVE) 2015, 2017
              Experts Exchange Top Expert Visual Basic Classic 2012 to 2017
              Experts Exchange Top Expert VBA (current)
mcrmgAuthor Commented:
Okay, I am back. I think the only thing I see so far is to remove -1 on line 9. thanks
Martin LissOlder than dirtCommented:
Yes, you're correct.
mcrmgAuthor Commented:
Thank you very much
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