function search_almost_twenty()
% create a 100x100 matrix...
m = unifrnd(0,20, 100,100);
for i = 1:100
  for j = 1:100
    disp( m(i,j) )
    if ( abs(m(i,j) - 20) < 1e-2 )
      return
    endif
  endfor
endfor
endfunction

search_almost_twenty()

% avoiding function, we need a control variable.
m = unifrnd(0,20, 100,100);
innerloopbreak = false;
for i = 1:100
  for j = 1:100
    disp( m(i,j) )
    if ( abs(m(i,j) - 20) < 1e-2 )
      innerloopbreak = true;
      break;
    endif
  endfor
  if ( innerloopbreak )
    break;
  endif
endfor