Javascript中的简单减法错误 [英] Simple subtraction bug in Javascript

问题描述

我很惊讶在JS中看到这样一个基本的减法错误，我相信大多数人都会遇到这个问题，请帮我解决这个问题，
我所做的就是减去一个数字从100给出了意想不到的结果，下面列举了一个例子

I was shocked to see such a basic subtraction bug in JS, I am sure most of you here would have experienced this issue, please help me with a work around here, All I am doing is subtracting a number from 100 which gives unexpected results, an example is stated below

100 - 99.1
// returns 0.9000000000000057

我在这里做错了吗？ ：S我很困惑

Am I doing something wrong here ? :S I am confused

推荐答案

浮点值永远不会像你期望的那样准确。您可以使用Number对象将其转换为您需要的答案。

Floating point values are never accurate as you expect. You can use Number object to convert this to answer as you need.

Number(100).toFixed(2) - Number(99.1).toFixed(2)

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