html运行实例（eg_js_number_inaccurate

代码示例：（标识：eg_js_number_inaccurate_3）

<!DOCTYPE html>
<html>
<body>

<h1>JavaScript 数字</h1>

<p>浮点的算数并不总是 100% 精准：</p>

<p id="demo1"></p>

<p>但是乘法和除法是有用的：</p>

<p id="demo2"></p>

<script>
var x = 0.2 + 0.1;
document.getElementById("demo1").innerHTML = "0.2 + 0.1 = " + x;
var y = (0.2*10 + 0.1*10) / 10;
document.getElementById("demo2").innerHTML = "0.2 + 0.1 = " + y;
</script>

</body>
</html>