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<!DOCTYPE html>
<html>
<body>
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<h1>JavaScript 数字</h1>
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<h2>创建 BigInt</h2>
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<p id="demo"></p>
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<script>
let x = 123456789012345678901234567890n;
let y = BigInt("123456789012345678901234567890");
document.getElementById("demo").innerHTML = x + "<br>" + y;
</script>
​
</body>
</html>
​