Edit This Code:
<!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>


Result:
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