how to restart a foreach loop in js;

Question

$('.thumb').each(function(i){ 
                if(i>= 4){
                    $(this).addClass('col-' + (i));
                }{
            $(this).addClass('col-' + (i));

                }

and i want result like

what i do to add this class

Answer 1

Use the modulo operator:

$('.thumb').each(function(i){ 
  $(this).addClass('cold-' + (i % 4));
}