Excel-VBA: Variable declaration necessary?

Question posted 2010 · +2 upvotes

Would it be wrong if write the following code

Sub Something()
 Dim i As integer
 Dim xRange As Range
 Dim yRange As Range

 Set xRange= Range("x_table")
 Set yRange= Range("y_table")

 For i = 1 To xRange.Columns.Count
    xRange.Columns(i) = Application.Sum(y_table.Columns(i))
 Next i
End Sub

without specifically declaring each of the variables? Like bellow;

Sub Something()
 Set xRange= Range("x_table")
 Set yRange= Range("y_table")

 For i = 1 To xRange.Columns.Count
    xRange.Columns(i) = Application.Sum(y_table.Columns(i))
 Next i
End Sub