使用 javascript 浮点数
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Float sum with javascript
提问by davioooh
Possible Duplicate:
Is JavaScript's Math broken?
可能的重复：
JavaScript 的数学有问题吗？
I'm calculating the sum of several float values using javascript and... I've noticed a strange thing never seen before. Executing this code:
我正在使用 javascript 计算几个浮点值的总和……我注意到了一件以前从未见过的奇怪事情。执行这段代码：
parseFloat('2.3') + parseFloat('2.4')
I obtain 4.699999999999999
我得到4.699999999999999
So... what sould I do to obtain a correct value? (supposed that this is incorrect...)
那么......我该怎么做才能获得正确的价值？（假设这是不正确的......）
回答by Darin Dimitrov
Once you read what What Every Computer Scientist Should Know About Floating-Point Arithmeticyou could use the .toFixed()function:
一旦你阅读了What Every Computer Scientist should Know About Floating-Point Arithmetic，你就可以使用这个.toFixed()函数：
var result = parseFloat('2.3') + parseFloat('2.4');
alert(result.toFixed(2));?
回答by Gyan Chandra Srivastava
(parseFloat('2.3') + parseFloat('2.4')).toFixed(1);
its going to give you solution i suppose
我想它会给你解决方案
