jquery set input value

//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();
 $('#IdOfTheField').on('change', function() {
  alert( this.value );
});$('selector').val('new value');    $("button").click(function(){
  $("input:text").val("Glenn Quagmire");
 })