[jQuery] How to terminate each befor full iteration

[wyo]

I'd like to terminat (beak) the iteration in the following code if a
value is emtpy. Is that somehow possible?

  var okay = true;
  $('.input_required').each (function (i){
    if ($(this).val() == "") {
      okay = false;
    }
    if (!okay) ???
  })

O. Wyss