es6 小数保留四位

在ES6中，可以使用toFixed()方法来保留小数位数。例如，如果要保留一个小数的四位，可以使用以下代码：

const num = 0.123456;
const result = num.toFixed(4);
console.log(result); // 输出0.1234

这样就可以将小数保留为四位了。注意，使用toFixed()方法会将结果转换为字符串类型。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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