代码示例:(标识:eg_js_number_tofixed)
<!DOCTYPE html>
<html>
<body>

<h1>JavaScript 数字方法</h1>

<p>toFixed() 方法将数字四舍五入为给定的位数。</p>

<p>对于处理金钱,toFixed(2) 是完美的。</p>

<p id="demo"></p>

<script>
var x = 9.656;
document.getElementById("demo").innerHTML =
  x.toFixed(0) + "<br>" +
  x.toFixed(2) + "<br>" +
  x.toFixed(4) + "<br>" +
  x.toFixed(6);
</script>

</body>
</html>
运行结果: