how to execute loop again and again without double executing the program?

On any image if i clicked two times then i got the distance between that two points. Again i want to do same step without executing the program then which loop will work? I mean how it execute again and again.. my single two points execution is...

promptMessage = sprintf('left click on the two points'); titleBarCaption = 'Continue ?'; button = questdlg(promptMessage,titleBarCaption,'Continue','Cancel','Continue'); if strcmpi(button,'cancel') return; end [x,y] = ginput(2) distance = sqrt((x(2)-x(1))^2+(y(2)-y(1))^2) Message = sprintf('the distance is %3f pixel', distance); uiwait(helpdlg(message));

Answer 1

[Mischa Kim]

Kanu, something like (not optimized)

 ...
 exitFLAG = true;
 while exitFLAG
    [x,y] = ginput(2)
    if ~strcmp(get(gcf,'Selectiontype'),'normal')
        exitFLAG = false;  % exit for mouse right-click
    end
    distance = sqrt((x(2)-x(1))^2+(y(2)-y(1))^2) 
    Message  = sprintf('the distance is %3f pixel', distance); 
 end

[kanu]

thanks..