html - how to detect which button is clicked using jQuery

Question

how to detect which button is clicked using jQuery

<div id="dBlock">
 <div id="dCalc">
  <input id="firstNumber" type="text" maxlength="3" />
  <input id="secondNumber" type="text" maxlength="3" />
  <input id="btn1" type="button" value="Add" />
  <input id="btn2" type="button" value="Subtract" />
  <input id="btn3" type="button" value="Multiply" />
  <input id="btn4" type="button" value="Divide" />
 </div>
</div>

Note: above "dCalc" block is added dynamically...

Answer 1

$("input").click(function(e){
    var idClicked = e.target.id;
});