How to loop through form elements created with the append function ?

2. var html = '<tr>'
3. +'<td><input type="text" name="label[]" class="label width400" value="" required /></td>'
4. +'<td class="formElem"></td>'
5. +'<td><input type="text" name="name_column[]" class="name_column" value="" class="width400" required /></td>'
7. +'<td><button type="button" class="removeColumn">-</button></td></tr>';
10. var numColumn = $('#numColumn').val();
11. 
    
12. for (i = 0; i < numColumn; i++) {
13. console.log('i : ' + i);
14. $('#table_create').append(html);
15. $('#table_create').trigger('create');
16. }

On click  button to validate the form, I would like to check if all form inputs exists / are not empty.

I tried :

1. $('.label ').each(function(){
2.       if ( !$(this).val() ){
3.             alert( "please enter the label");
4.       }
5. });