how to selected values to select box using jquery code example

Example 1: jquery selected option

$( "#myselect option:selected" ).val();

Example 2: jquery selected option value

$(document).ready(function(){
    $("select.country").change(function(){
        var selectedCountry = $(this).children("option:selected").val();
        alert("You have selected the country - " + selectedCountry);
    });

Example 3: how to show selected value in select box using jquery

$('selector').val(value);