How to get output in edit box of for loop in matlab gui?

im = imread('image5.jpg');
 bw= im2bw(im,0.7);
    label=bwlabel(bw); 
    stats=regionprops(label,'Solidity','Area');
    density=[stats.Solidity];
    area=[stats.Area]; 
    high_dense_area=density>0.8; 
    max_area=max(area(high_dense_area));
    a = max_area
    if (100<a<250)
        fprintf('stage 1a');
    else
        fprintf('stage0');
    end

[Walter Roberson]

https://www.mathworks.com/matlabcentral/answers/458428-how-to-get-output-of-for-loop-in-edit-box-for-matlab-gui is more complete question