This page has 1 thread | Add post

Finding our videos useful? Please consider helping us to share more!

Excel VBA - Basics videos | Excel VBA Part 15.1 - Do Until and Do While Loops

Posted by Andrew Gould on 06 February 2014

Excel VBA Part 15.1 - Do Until and Do While Loops

Do Loops in VBA allow you to carry out a set of instructions repeatedly until some kind of condition is met. This video teaches you about the basics of the Do Loop statement including how to write Do Until and Do While loops, where to place your conditional statements and how to exit from a loop. The final part of the video provides a couple of longer examples using Do Loops.

See our full range of VBA training resources, or test your knowledge of VBA with one of our VBA skills assessment tests.

There are no files which go with this video.

There are no exercises for this video.

Making a video bigger

You can increase the size of your video to make it fill the screen like this:

Play your video (the icons shown won't appear until you do), then click on the full screen icon which appears as shown above.

When you've finished viewing a video in full screen mode, just press the Esc key to return to normal view.

Improving the quality of a video

To improve the quality of a video, first click on the Settings icon:

Make sure yoiu're playing your video so that the icons shown above appear, then click on this gear icon.

Choose to change the video quality:

Click as above to change your video quality.

The higher the number you choose, the better will be your video quality (but the slower the connection speed):

Don't choose the HD option shown unless your connection speed is fast enough to support it!

Is your Wise Owl speaking too slowly (or too quickly)? You can also use the Settings menu above to change your playback speed.

This page has 1 thread

Add a new post

From:	Costas
When:	24 Apr 17 at 11:26

Reply to Costas

Hi,

I was wondering if you could help with the following question. Why the Do Loop stops when it comes accross a value of 0 in a table with integer numbers? How can I handle such a case?

Thanks in advance for the help.

Costas

From:	Andrew G
When:	24 Apr 17 at 11:56

Reply to Andrew G

Hi, what have you written as your Do Until or Do While statement? If you're testing for an empty string as shown in the video then this code will reach the end of the list, even if it contains 0:

Range("A1").Select

Do Until ActiveCell.Value = ""
'do something useful
ActiveCell.Offset(1, 0).Select
Loop

If that's not working for you, you could try using the IsEmpty function instead, like so:

Range("A1").Select

Do Until IsEmpty(ActiveCell.Value)
'do something useful
ActiveCell.Offset(1, 0).Select
Loop

I hope that helps!

From:	Costas
When:	24 Apr 17 at 12:24

Reply to Costas

Hi thanks for the prompt response. I think I got it..

Excel reads the 0 number as an empty cell. So the loop stops because of that. Hence, in my vba code which manipulates time-series price data, I need to add some kind of condition (eg. offset) for the loop to continue.

Thanks a lot once more.

From:	Andrew G
When:	25 Apr 17 at 11:23

Reply to Andrew G

The Empty keyword is used for testing uninitialised Variant variables, not the contents of cells. That's why this video doesn't include any mention of using the Empty keyword.

From:	Costas
When:	25 Apr 17 at 09:30

Reply to Costas

Hi Andrew,

The simple code I am testing is the following:

Sub DoUntilStatemet()

Range("b1").Select

Do Until ActiveCell = Empty

Select Case ActiveCell
Case 0 To 0.5
ActiveCell.Offset(0, 7).Value = "Positive"
Case 0.51 To 1
ActiveCell.Offset(0, 7).Value = "Very Positive"
Case Else
ActiveCell.Offset(0, 7).Value = "Negative"
End Select

ActiveCell.Offset(1, 0).Select
Loop

End Sub

I notice a difference between the keyward "Empty" that I use instead of " " or the function "IsEmpty".

Empty works with non-zero values. The other suggestions work regardless. I didnt knew that detail.

Thanks

From:	Andrew G
When:	25 Apr 17 at 06:49

Reply to Andrew G

Hi, it shouldn't be necessary to add another condition - both of the examples shown above will loop to the end of a list which contains 0. Which condition are you testing for in your current code?

Add a new post

Book any course as classroom, onsite or online training, or as one-to-one consultancy

Free resources

Paid services

Getting help

Where we are

Where you are

Online

Transparent reviews

Delivery of courses

Nicer to work with

Reliable and established

Our training courses

C#

Excel

MySQL

Power Apps

Power Automate

Power BI and DAX

Python

Report Builder

SQL

SQL Server

VBA Macros

Other training resources

Blogs

Exercises

YouTube tutorials

YouTube shorts

Test your skills

Consultancy

Courseware

Self-paced courses

Newsletters

Publications

Our training venues

London

Manchester

Across the UK

At your site

Online

Why we are different

Hundreds of published reviews

Small class sizes

Outstanding courseware

Online classroom

(Almost) no cancellations

Wise Owl trainers only

Genuine integrity

Invoices after training

30+ years of Wise Owl

Our top 100 clients

BY CATEGORY

VBA CATEGORIES