<!DOCTYPE html>
<html>
<body>
<h1>JavScript 数値</h1>
<h2>整数の精度</h2>
<p>9007199254740992は9007199254740993と等しいですか?</p>
<p id="demo"></p>
<script>
let x = 9007199254740992 === 9007199254740993;
document.getElementById("demo").innerHTML = x;
</script>
</body>
</html>
