<html>
<head>
</head>
<body>
<form >
<label>
Enter First Number
</label>
<input type="text" id="n1"/>
<label>
Enter second number
</label>
<input type="text" id="n2"/>
<br>
<button type="button" onClick="getval()">Click me</button>
<label>
Answer
</label>
<input type="text" id="n3"/>
</form>
<br>
<p id="p1">ahmad amjad</p>
</body>
</html>
<script>
function getval()
{
var num1;
num1 = parseInt(document.getElementById("n1").value);
var num2= parseInt(document.getElementById("n2").value);
var sum=num1+num2;
document.getElementById("n3").value=sum;
document.getElementById("p1").innerHTML="this is answer";
confirm("are u sure");
alert("its ok");
}
</script>
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