js如何保留两位小数；toFixed()如何使用
时间：2026-07-17 09:49:00
浏览：926次
toFixed() 方法可把 Number 型数据进行四舍五入为指定小数位数的数字。
toFixed()语法：NumberObject.toFixed(num)，num参数是 0 ~ 20 之间的整数是必须的参数，用于设置保存小数的位数。
打开html开发软件，新建一个html代码页面。
在html代码页面找打
标签，在这个标签后面创建一个<script>用于设置保存两位小数。</p><p>在<script>创建一个number类型的数字，然后使用toFixed(2)对number类型数字保存两位小数，最后使用document.write打印出成果保存两位小数数字。</p><p>JavaScript代码：</p><p><script type="text/javascript"></p><p> var num = 123;//定义一个number类型；</p><p> document.write("保存两位小数："+ num.toFixed(2) );</p><p> </script></p><p>保存html代码页面，然后使用浏览器打开即可看到保存两位小数的数字。</p> </div>
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