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

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.

Answer 1

[Image Analyst]

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]

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]

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 <.

Answer 2

[Ameer Hamza]

You can do it without loop

count = find(sumCheck>9, 1) - 1;

[Soph E]

thank you. but i am trying to use a while loop, specifically