title: loop wth floating value increment in shell
body: <p>I would like to execute a script within the following loop.</p>
  
  <pre><code>x=10.000; nx=3; dx=0.125; y=15.000; ny=5; dy=0.120
  for i in {1..3};do
  for j in {1..5};do
  xi=xi+($i-1)*dx
  yj=yj+($j-1)*dy
  echo $xi $yj #run the script which needs the values of xi and yj for each run
  done
  done
  </code></pre>
  
  <p>desire output</p>
  
  <pre><code>10.000 15.000
  10.000 15.120
  10.000 15.240
  10.000 15.360
  10.000 15.480
  10.125 15.000
  10.125 15.120
  10.125 15.240
  10.125 15.360
  10.125 15.480
  10.250 15.000
  10.250 15.120
  10.250 15.240
  10.250 15.360
  10.250 15.480
  </code></pre>