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<h2>JavaScript Numbers</h2>
<p>Integers (numbers without a period or exponent notation) are accurate up to 15 digits:</p>
<p id="demo"></p>
<script>
var x = 999999999999999;
var y = 9999999999999999;
document.getElementById("demo").innerHTML = x + "<br>" + y;
</script>
</body>
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