To process a form with jQuery, you should add an event listener to the form element for the 'submit' event:
    $("form").on("submit", function() {
       // process form
    });
If you are processing the form entirely in jQuery, then you should call preventDefault() to prevent the page reloading:
    $("form").on("submit", function(event) {
       event.preventDefault();
       // process form
    });
When you want to know what a user filled out for an input in a form, you typically use val():
    var answer = $("#answer").val();
Inside the callback function, you can reference the form element using the this keyword. A common pattern is to call find() on the form element, to find only inputs inside the form element:
    $("form").on("submit", function() {
      // store the value of the input with name='age' 
       var age = $(this).find('[name=age]').val();
    });