Add value to html input in jquery code example

Example 1: how to get a value using jquery

//for imput field given in HTML

<input type="text" id="myid" class="myclass" >
  
// Using ID to find value
  
$("#myid").val();

// Using Class to find value

$(".myclass").val();

Example 2: assign input text value jquery

<?= $this->Form->input('number_six', array(
     'label' => false,
     'class' => 'form-control number_six',
     'maxlength' => "1" ,
     'oninput' => "this.value=this.value.replace(/[^0-9]/g,'');"
   ));?>

$(".number_six").val("");