JavaScript program to add Two number

	<!doctype html>
	<html>
	<head>
	<script>
	function sum(){
	var a,b,c;
	a=Number(document.getElementById("first").value);
	b=Number(document.getElementById("second").value);
	c= a + b;
	document.getElementById("answer").value= c;
	}
	</script>
	</head>
	<body>
	Enter the First number : <input id="first"><br>
	Enter the Second number: <input id="second"><br>
	<button onclick="sum()">Add</button>
	<input id="answer">
	</body>
	</html>