1. CS 106 Computing Fundamentals II Chapter 64 “For Loop Variations”
Herbert G. Mayer, PSU CS
Status 7/20/2013
Initial content copied verbatim from
CS 106 material developed by
CS professors: Cynthia Brown & Robert Martin

2. Syllabus Different For Loop Collections Changing the Increment
Make Alternate Cells Blue

3. Different For Loop VBA has two kinds of For loops
The first kind is controlled by a variable that is automatically incremented, and runs between a beginning and ending value
The second kind is a For Each loop: it is executed for every member of a collection

4. Collections
There are various types of collections in VBA. For example, open workbooks are a collection:
Sub CloseInactive()
Dim Book As Workbook
For Each Book In Workbooks ‘ note “In” operator!
If Book.Name <> ActiveWorkBook.Name Then Book.Close
End If
Next Book
End Sub

5. Changing the Increment
Our examples so far have used an increment of 1 for the control variable
This is the default and no special code needs to be written for it
You can also use other increments, using the Step keyword to control explicit step size different from 1

6. Make Alternate Cells Blue
Const CHANGEROW As Long = 8 Const LASTCOL As Long = 10 Sub BlueSkip() Dim j As Long For j = 1 To LASTCOL Step 2 Cells( CHANGEROW, j ).Interior.Color = vbBlue Next j ‘ but its value is: j = j + 2 End Sub