Mass convert OpenDocument like odf and ods to excel

It turns out that we can use LibreOffice to mass convert OpenDocument, such as odf, ods, or etc, to other format. What I need is to mass convert ods files to xls. We just need a single line to convert a file.
 For example, when we want to convert file.ods to file.xls on current folder, we use the following line in bash:

 soffice --headless --convert-to xls file.ods  

To mass convert all file in current folder, use the following code:

 for i in *.ods;   
  do soffice --headless --convert-to xls "$i" ;   
 done  

Sample code can be found in https://github.com/joielechong/collection_of_script under bash folder.