Number of columns in excel 2010 - An important fact about excel 2010

There are 16384 columns in excel 2010. Column title of last column is "XFD" 

This is how I found it by VBA code.

I wrote below code.

Sub columnLimit()

For i = 1 To 100000

    Cells(12, i).Value = i

Next i

End Sub

And run it in a worksheet. Then I got below error message.

Clicked OK and went to end of columns using scroll bar. Found the result