Excel VBA Loop on columns - vba

Question

when we are going to do a loop in the rows, we can use code like the following:
i = 1
Do
Range("E" & i & ":D" & i).Select
i = i + 1
Loop Until i > 10
but what if we want to do a loop on a column?
Can we use the same method as above?
while the columns in Excel is a complex such as A, B, C, ..., Y, Z, AA, AB, AC, ..., etc.
problems will arise between loop from the "Z" to the "AA".
how we do looping alphabet column from "A" to "Z" and then continued into "AA", "AB" and so on
is there anything that can help?

Answer 1

Yes, let's use Select as an example
sample code: Columns("A").select
How to loop through Columns:
Method 1: (You can use index to replace the Excel Address)
For i = 1 to 100
Columns(i).Select
next i
Method 2: (Using the address)
For i = 1 To 100
Columns(Columns(i).Address).Select
Next i
EDIT:
Strip the Column for OP
columnString = Replace(Split(Columns(27).Address, ":")(0), "$", "")
e.g. you want to get the 27th Column --> AA, you can get it this way

Answer 2

Another method to try out.
Also select could be replaced when you set the initial column into a Range object. Performance wise it helps.
Dim rng as Range
Set rng = WorkSheets(1).Range("A1") '-- you may change the sheet name according to yours.
'-- here is your loop
i = 1
Do
'-- do something: e.g. show the address of the column that you are currently in
Msgbox rng.offset(0,i).Address
i = i + 1
Loop Until i > 10
** Two methods to get the column name using column number**
Split()
code
colName = Split(Range.Offset(0,i).Address, "$")(1)
String manipulation:
code
Function myColName(colNum as Long) as String
myColName = Left(Range(0, colNum).Address(False, False), _
1 - (colNum > 10))
End Function

Answer 3

If you want to stick with the same sort of loop then this will work:
Option Explicit
Sub selectColumns()
Dim topSelection As Integer
Dim endSelection As Integer
topSelection = 2
endSelection = 10
Dim columnSelected As Integer
columnSelected = 1
Do
With Excel.ThisWorkbook.ActiveSheet
.Range(.Cells(columnSelected, columnSelected), .Cells(endSelection, columnSelected)).Select
End With
columnSelected = columnSelected + 1
Loop Until columnSelected > 10
End Sub
EDIT
If in reality you just want to loop through every cell in an area of the spreadsheet then use something like this:
Sub loopThroughCells()
'=============
'this is the starting point
Dim rwMin As Integer
Dim colMin As Integer
rwMin = 2
colMin = 2
'=============
'=============
'this is the ending point
Dim rwMax As Integer
Dim colMax As Integer
rwMax = 10
colMax = 5
'=============
'=============
'iterator
Dim rwIndex As Integer
Dim colIndex As Integer
'=============
For rwIndex = rwMin To rwMax
For colIndex = colMin To colMax
Cells(rwIndex, colIndex).Select
Next colIndex
Next rwIndex
End Sub

Answer 4

Just use the Cells function and loop thru columns.
Cells(Row,Column)