# How do I call the elements in an array to be counted?

2 views (last 30 days)
Soph E on 26 Nov 2020
Commented: Image Analyst on 26 Nov 2020
I am trying to create a while loop which loops over the elements in the array sumCheck and stops looping when it reaches an element that is greater than 9. I also want to count how many times the loop loops, so I've used count.
count = 0
while sumCheck <= 9 && count<=length(sumCheck)
count = count + 1
end
count
So far I've written this, but I feel like I'm missing something. I'm not sure how to call for all the elements in sumCheck to be less than 9.

Image Analyst on 26 Nov 2020
Try this
count = 1;
while sumCheck(count) <= 9
count = count + 1
end
fprintf('Exited loop when count = %d and sumCheck(%d) = %f.\n', count, count, sumCheck(count))

Soph E on 26 Nov 2020
thank you. however it seems to stop at the element after the element of value of 9 instead of at the element of value 9 itself e.g. at 10 instead of 9?
Image Analyst on 26 Nov 2020
Yes, because you said "stops looping when it reaches an element that is greater than 9." so it will stop at 10. If you want the one before that, simply subtract 1 from count after the loop.
count = 1;
while sumCheck(count) <= 9
count = count + 1
end
fprintf('Exited loop when count = %d and sumCheck(%d) = %f.\n', count, count, sumCheck(count))
count = count - 1;
or change <= to <.

Ameer Hamza on 26 Nov 2020
You can do it without loop
count = find(sumCheck>9, 1) - 1;

#### 1 Comment

Soph E on 26 Nov 2020
thank you. but i am trying to use a while loop, specifically

R2020b

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