To write a macro that will compare data from two cells and format the cells accordingly, you can use the following steps:
Open the Microsoft Visual Basic for Applications (VBA) editor by pressing Alt + F11.
In the VBA editor, select "Insert" and then "Module" to create a new module.
In the new module, type the following code to define a new subroutine called "FormatCells":
Sub FormatCells()
End Sub
To find the last row with data in it, use the "End" and "Down" methods of the Range object:
Sub FormatCells()
Dim lastRow As Long
lastRow = Range("B" & Rows.Count).End(xlUp).Row
End Sub
To iterate over the cells in column B starting from B3, use a for loop with the "lastRow" variable as the upper bound:
Sub FormatCells()
Dim lastRow As Long
lastRow = Range("B" & Rows.Count).End(xlUp).Row
For i = 3 To lastRow
' Compare the values in cells B3, B4, B5, etc. and format the cells accordingly
Next i
End Sub
Inside the for loop, use the "If" statement to compare the values in cells B3, B4, B5, etc. and format the cells accordingly:
Sub FormatCells()
Dim lastRow As Long
lastRow = Range("B" & Rows.Count).End(xlUp).Row
For i = 3 To lastRow
If Cells(i, 2).Value > Cells(i - 1, 2).Value Then
' Format the cell with blue interior
ElseIf Cells(i, 2).Value < Cells(i - 1, 2).Value Then
' Format the cell with yellow interior
Else
' Do not format the cell
End If
Next i
End Sub
To format the cells with a blue or yellow interior, use the "Interior" property of the Range object:
Sub FormatCells()
Dim lastRow As Long
lastRow = Range("B" & Rows.Count).End(xlUp).Row
For i = 3 To lastRow
If Cells(i, 2).Value > Cells(i - 1, 2).Value Then
Cells(i, 2).Interior.Color = vbBlue
ElseIf Cells(i, 2).Value < Cells(i - 1, 2).Value Then
Cells(i, 2).Interior.Color = vbYellow
Else
' Do not format the cell
End If
Next i
End Sub
To run the macro, press F5 or select "Run" and then "Run Sub/UserForm" in the VBA editor. This will execute the code in the "FormatCells" subroutine and apply the formatting to the cells in column B.