MATLAB: What’s wrong in this

Question

Write a function called small_elements that takes as input an array named X that is a matrix or a vector. The function identifies those elements of X that are smaller than the product of their two indexes. For example, if the element X(2,3) is 5, then that element would be identified because 5 is smaller than 2 * 3. The output of the function gives the indexes of such elements found in column-major order. It is a matrix with exactly two columns. The first column contains the row indexes, while the second column contains the corresponding column indexes. For example, the statement indexes = small_elements([1 1; 0 4; 6 5], will make indexes equal to [2 1; 1 2; 3 2]. If no such element exists, the function returns an empty array.

if true
  % code
end
function B=small_elements(A)
  B=[];
  for ii=(1:size(A,1))
      for jj=(1:size(A,2))
      if (A(ii,jj))<ii*jj
          B=[B; ii jj];
      end;
      end;
  end;
*Your function made an error for argument(s) [0 -7 -7;10 -1 9;9 -4 4;-10 2 8;4 -8 3;9 8 8;-7 8 -3]*

Answer 1

K = randi([1 10],5,2) ;
I = [] ; J = [] ;
for j = 1:size(K,2)
    for i = 1:size(K,1)
        if K(i,j)<i*j
            I = [I ; i] ;
            J = [J ; j] ;
        end
    end
end