JavaScript adding decimal numbers issue

This question already has an answer here:

Is floating point math broken? 23 answers

---

Use toFixed to convert it to a string with some decimal places shaved off, and then convert it back to a number.

+(0.1 + 0.2).toFixed(12) // 0.3

It looks like IE's toFixed has some weird behavior, so if you need to support IE something like this might be better:

Math.round((0.1 + 0.2) * 1e12) / 1e12

---

function add(){
    var first=parseFloat($("#first").val());
    var second=parseFloat($("#second").val());
    $("#result").val(+(first+second).toFixed(2));
}

DEMO。

---

This is common issue with floating points.

Use toFixed in combination with parseFloat .

Here is example in JavaScript.

链接地址: http://www.djcxy.com/p/27446.html

上一篇: 为什么在Javascript中添加两位小数会产生错误的结果？

下一篇: JavaScript添加十进制数字问题