Excel 2019 Power Programming with VBA. Michael Alexander

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СКАЧАТЬ in the previous section. The difference in these two procedures is where the condition is evaluated (at the beginning or the end of the loop). Here is the first example:

      Sub EnterDates3() ' Do Until, with test at beginning Dim TheDate As Date TheDate = DateSerial(Year(Date), Month(Date), 1) Do Until Month(TheDate) <> Month(Date) ActiveCell = TheDate TheDate = TheDate + 1 ActiveCell.Offset(1, 0).Activate Loop End Sub

      Here is the second example:

      Sub EnterDates4() ' Do Until, with test at end Dim TheDate As Date TheDate = DateSerial(Year(Date), Month(Date), 1) Do ActiveCell = TheDate TheDate = TheDate + 1s ActiveCell.Offset(1, 0).Activate Loop Until Month(TheDate) <> Month(Date) End Sub

The following example was originally presented for the Do While loop but has been rewritten to use a Do Until loop. The only difference is the line with the Do statement. This example makes the code a bit clearer because it avoids the negative required in the Do While example.

      Sub DoUntilDemo1() Dim LineCt As Long Dim LineOfText As String Open "c:\data\textfile.txt" For Input As #1 LineCt = 0 Do Until EOF(1) Line Input #1, LineOfText Range("A1").Offset(LineCt, 0) = UCase(LineOfText) LineCt = LineCt + 1 Loop Close #1 End Sub

      NOTE

      VBA supports yet another type of loop, While Wend. This looping structure is included primarily for compatibility purposes. Here's how the date entry procedure looks when it's coded to use a While Wend loop:

      Sub EnterDates5() Dim TheDate As Date TheDate = DateSerial(Year(Date), Month(Date), 1) While Month(TheDate) = Month(Date) ActiveCell = TheDate TheDate = TheDate + 1 ActiveCell.Offset(1, 0).Activate Wend End Sub

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