JQuery code to append html using div id

Here am going to show you JQuery code to append html using div id
suppose i have html code like below i need append a text content to the html area when user entering any text

 

<input type="text" value="" id="inputarea">

<div id="html_area">

</div>

$(document).ready(function(){
$("#inputarea").blur(function(){
  $("#html_areap").append("<b>User Is typing a text</b>");
});
});