How to right align numeric data to right in dataTables

I am using dataTables plugin. I see that numeric data is not right aligned.

• Is this how dataTables work?
• Have I incorrectly formatted in the data?
• How do I write functionality that checks the data type of each cell of a dataTable and aligns the data to right if it is numeric?

The plugin I used is from here: http://www.datatables.net/

In the columns definition you can use className:

$("#tabDatos").dataTable({
  columns: [
    { data: "fecha" },    
    { data: "importe", className: "text-right" }
  ]
});

And define the css class "text-right" if you aren't using Bootstrap