Loop through elements?
A = magic(4);
s = 0;
for elt = 1:numel(A)
s = s + A(elt);
end
fprintf("The sum of elements in a 4-by-4 magic sum is %d.", s)
Through columns?
cs = zeros(4, 1);
for col = 1:width(A)
cs = cs + A(:, col);
end
fprintf("The sum of the columns is")
disp(cs)
or you can just use the array as the indices.
cs2 = zeros(4, 1);
for col = A
cs2 = cs2 + col;
end
fprintf("The sum of the columns is also")
disp(cs2)
Through rows?
rs = zeros(1, 4);
for row = 1:height(A)
rs = rs + A(row, :);
end
fprintf("The sum of the rows is")
disp(rs)
Do you need to loop?
Depending on what you want to do, though, you may not need to loop.
fprintf("A has %d elements greater than 11", nnz(A > 11))
