title: Dynamic reactive form controls
body: <p>Requirement  :
  There will be two calendar inputs. If user selects the range from May 2020 to May 21. I should create 3 set of 12 dynamic reactive form controls. It should also have required field validations.
  PS : Am quite new to this dynamic controls. And I see in some forums to use for formarray. Please help me with some headers. will go ahead with that. Thanks</p>