How to sum an array using a while loop?
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So I have been attempting to add a 9 element 1x1 array using the while loop. I have failed miserably for over 3 hours. I attempted to use:
x=1:length(array)
sumx2=0
while sumx2<sum(array)
sumx2=sumx2+x(array)
end
at times I get numbers increasing on Matlab and they don't stop. Will you be kind enough to share your knowledge? Thank you in advance.
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Answers (1)
Star Strider
on 2 Nov 2014
I didn’t want to disrupt your code too much, but I had to do some editing:
array = rand(1,9); % Test Array
x=1:length(array); % You probably Don’t Need This
sumx2=0
k = 1; % Add Counter Variable
while k <= length(array)
sumx2=sumx2+array(k); % Add Element Of ‘array’ to ‘sum2’
k = k+1; % Increment Counter
end
You were on the correct track, but weren’t implementing your idea correctly. You need to address each element of ‘array’ individually to add it incrementally to ‘sum2’.
2 Comments
Star Strider
on 3 Nov 2014
My pleasure!
It’s a different method, yes, and is probably as efficient as my code.
If you’re just getting started with programming, you’ll find that with the exception of the very simplest programs, there are a number of different ways of solving the same problem. Speed of execution is usually the criterion for deciding the ‘best’ method, but such things as memory utilisation can also be the deciding factor.
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