Please Note: This article is written for users of the following Microsoft Excel versions: 97, 2000, 2002, and 2003. If you are using a later version (Excel 2007 or later), this tip may not work for you. For a version of this tip written specifically for later versions of Excel, click here: Exiting a For ... Next Loop Early.

Exiting a For ... Next Loop Early

by Allen Wyatt
(last updated September 19, 2014)

2

If you use For ... Next loops in your macro programming (who doesn't?), then you should know that they can take a great deal of time. You can minimize this by only checking what you need. For instance, consider the following code, which checks an array to see if a value exists. If it doesn't, then it adds the value to the end of the array. If it does, then the value is not added.

AddIt = False
For J = 1 to NumEntries
    If NumValues(J) = ToAdd Then AddIt = True
Next J
If AddIt Then
    NumEntries = NumEntries + 1
    NumValues(NumEntries) = ToAdd
End If

This works great, but if the array gets large, you can end up going through the For ... Next loop quite a few times. Now consider the following code, which accomplishes the same task, but dumps out of the For ... Next loop early if a match is detected.

AddIt = False
For J = 1 to NumEntries
    If NumValues(J) = ToAdd Then
        AddIt = True
        Exit For
    End If
Next J
If AddIt Then
    NumEntries = NumEntries + 1
    NumValues(NumEntries) = ToAdd
End If

Now if a match is found early on in the loop, all the rest of the iterations are skipped because the Exit For statement is encountered and the loop is basically exited right away. The result is a faster running macro.

ExcelTips is your source for cost-effective Microsoft Excel training. This tip (2260) applies to Microsoft Excel 97, 2000, 2002, and 2003. You can find a version of this tip for the ribbon interface of Excel (Excel 2007 and later) here: Exiting a For ... Next Loop Early.

Author Bio

Allen Wyatt

With more than 50 non-fiction books and numerous magazine articles to his credit, Allen Wyatt is an internationally recognized author. He  is president of Sharon Parq Associates, a computer and publishing services company. ...

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Comments for this tip:

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What is 9 - 7?

2012-02-20 07:40:00

Sylvain

It would be better to use a DO...LOOP loop instead.


2012-02-19 08:22:25

Pieter

It looks to me like there is a small mistake in this code: AddIt should be set to 'True' at first and then changed to 'False' when the value is found in the aray, not the other way around.


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