Solved

How would I exit an outer for loop from within an inner for loop?

Posted on 2014-12-14
3
137 Views
Last Modified: 2014-12-14
I have the following:

For a = 0 to 10
   For b = 0 to 10
      If (some condition) then
         'do something
      else
         exit outer loop (a) 'this is what I can't figure out how to do.
      End if
   Next b
Next a

How do I exit the outer For loop (a) from within For loop (b)?
0
Comment
Question by:NevSoFly
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 44

Assisted Solution

by:AndyAinscow
AndyAinscow earned 200 total points
ID: 40499018
Depends a bit

You can use Exit sub (or function) to exit completely from that point.
You can use GoTo to jump to a particular point later in the routine.
You can use a=10 and b=10 to meet the requirements for the loop to be completed and let the program just continue as if the loops had been fully completed
0
 
LVL 15

Accepted Solution

by:
ChloesDad earned 300 total points
ID: 40499079
Having to force exit from for loops indicates a bad program design, there are other structures that are better for this purpose. The reason for this is that a For loop implies that it should be iterated a specific number of times. Use a While loop and a Boolean to jump out when necessary. I have assumed that you also what to immediately exit Loop B as well as loop A.



a=0
ExitA = False
While a<=10 AND ExitA = False
    b = 0
    While b <= 10 AND ExitA = False

       If (some condition) then
          'do something
       else
          ExitA = True
       End if
       b = b +1
    Exit While '  (or WEND) depends on version
    a = a + 1
Exit While '  (or WEND) depends on version

Open in new window

0
 
LVL 44

Expert Comment

by:AndyAinscow
ID: 40499107
>>Having to force exit from for loops indicates a bad program design

I would say that is only partially correct.  There are times when a for loop does make sense eg. iterating an array, and one may want to exit the for loop before the end of the array is reached.
What is certain is that a for loop could be written as a while loop BUT that might be the same code in effect - just requiring more lines of code to be written.
0

Featured Post

Online Training Solution

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action. Forget about retraining and skyrocket knowledge retention rates.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article is for Object-Oriented Programming (OOP) beginners. An Interface contains declarations of events, indexers, methods and/or properties. Any class which implements the Interface should provide the concrete implementation for each Inter…
Performance in games development is paramount: every microsecond counts to be able to do everything in less than 33ms (aiming at 16ms). C# foreach statement is one of the worst performance killers, and here I explain why.
Monitoring a network: why having a policy is the best policy? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the enormous benefits of having a policy-based approach when monitoring medium and large networks. Software utilized in this v…
Do you want to know how to make a graph with Microsoft Access? First, create a query with the data for the chart. Then make a blank form and add a chart control. This video also shows how to change what data is displayed on the graph as well as form…

724 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question