Check the overlap between circles

This code is to check the overlap between circles, is it possible to do this without for loop?

function pairs = checkOverlap(circles, rads)  
%circles : circles matrix [x, y];   each row represents a circle; 
rads : radius of each circle
ncircles = size(circles,1); 

for i=1:ncircles -1
            % distances between circles:
            dx = bsxfun(@minus, circles(i,1), circles(i+1,1));
            dy = bsxfun(@minus, circles(i,2), circles(i+1,2));
            sumr(i) = bsxfun(@plus, rads(i,1), rads(i+1,1));

              % distance between centers:
              dist(i) = sqrt(dx.^2 + dy.^2);
  end

% pairs that have overlap:
pairs = find(dist < sumr);  
end

Run:

circles = rand(5, 2);   % 5 circles
rads = rand(5,1); % 5 radius 

Isoverlap = checkOverlap(circles, rads);

Answer 1

[Andrei Bobrov]

EDIT

rad2 = rads(:) + rads(:)';
dxy = sqrt(  (xy(:,1) - xy(:,1)').^2 + (xy(:,2) - xy(:,2)').^2 );

lo = dxy <= rad2;
lo(1:size(xy,1)+1:end) = false;

intersecting_circles = find(any(lo,2));

[shdotcom shdotcom]

Thank you very much for your answer. However, I could not understand the content of out. The output should be the indices of overlapped circles.