<!DOCTYPE html>
<html>
<body>
<p>Click the button to round different numbers to the nearest integer.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
var a = Math.round(2.60);
var b = Math.round(2.50);
var c = Math.round(2.49);
var d = Math.round(-2.60);
var e = Math.round(-2.50);
var f = Math.round(-2.49);
var x = a + "<br>" + b + "<br>" + c + "<br>" + d + "<br>" + e + "<br>" + f;
document.getElementById("demo").innerHTML = x;
}
</script>
</body>
</html>