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<!DOCTYPE html>
<html>
<body>
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<h1>JavaScript 数字</h1>
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<p>ES2021 引入了数字分隔符 (_) 以使数字更具可读性：</p>
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<p>1_000_000_000 和 1000000000 一样吗？</p>
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<p id="demo"></p>
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<script>
const num1 = 1_000_000_000;
const num2 = 1000000000;
document.getElementById("demo").innerHTML = (num1 === num2);
</script>
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</body>
</html>
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