How to change my code to include a while loop?

I generated this code and was wondering if there was any way to have it to the same function with using a while loop?

[Matthew]

function B=Sudoku(A)
[m,n]=size(A);
if m~=n
    error('The matrix is not square')
end
R=sum(A,1);
C=sum(A,2);
D=abs(diff(R));
E=abs(diff(C));
if any(D)||any(E) > 10^-7
    error('the sums are not the same')
else if all(D)&& all(E) <10^-7
        disp(C(1,1))
    end
end
B=C(1,1);

[Cedric]

 function B=Sudoku(A) 
    [m,n] = size(A); 
    if m ~= n
       error('The matrix is not square') 
    end 
    R = sum(A, 1) ; 
    C = sum(A, 2) ; 
    D = abs(diff(R)) ;
    E = abs(diff(C)) ; 
    if any(D) || any(E) > 10^-7 
       error('the sums are not the same')
    else
       if all(D) && all(E) < 10^-7 
          disp(C(1,1)) 
       end 
    end 
    B = C(1,1);

Your conditional statements are likely not to be correct actually; for example

 all(D) && all(E) < 10^-7

will be evaluate as the AND (short-circuit) between array D (where zero elements are interpreted as logical false and the others as true) and the outcome of the test with the relational operator (which is a logical array of element-wise < 10^-7, based on E).

What would you like to "loop" in this function?