Get selected value of a dropdown's item using jQuery

Question

How can I get the selected value of a dropdown box using jQuery?
I tried using

var value = $(\'#dropDownId\').val();

and

Answer 1

To get the jquery value from drop down you just use below function just sent id and get the selected value:

function getValue(id){
    var value = "";
    if($('#'+id)[0]!=undefined && $('#'+id)[0]!=null){
        for(var i=0;i<$('#'+id)[0].length;i++){
            if($('#'+id)[0][i].selected == true){
                if(value != ""){
                    value = value + ", ";
                }
                value = value + $('#'+id)[0][i].innerText;
            }
        }
    }
    return value;
}