Javascript无法正确呈现此数字：3494793310847464221 [英] Javascript can't render this number correctly: 3494793310847464221
问题描述
我有一个有趣的问题，我一直在用javascript做一些工作，数据库ID出现为3494793310847464221，现在这是作为数字输入javascript但是它使用数字作为不同的值，两者输出到警报时以及传递给另一个javascript函数时。
I have an interesting question, I have been doing some work with javascript and a database ID came out as "3494793310847464221", now this is being entered into javascript as a number yet it is using the number as a different value, both when output to an alert and when being passed to another javascript function.
下面是一些示例代码，可以最大限度地显示错误。
Here is some example code to show the error to its fullest.
<html><head><script language="javascript">alert( 3494793310847464221);
var rar = 3494793310847464221;
alert(rar);
</script></head></html>
这完全阻止了我，因为谷歌不是我的朋友......
This has completly baffeled me and for once google is not my friend...
btw这个数字比那里的数字多179个......
btw the number is 179 more then the number there...
推荐答案
你的号码大于javascript（2 ^ 53）中允许的最大整数值。之前已经涵盖了在不丢失精度的情况下，数字可以达到的JavaScript的最高整数值是多少？
Your number is larger than the maximum allowed integer value in javascript (2^53). This has previously been covered by What is JavaScript's highest integer value that a Number can go to without losing precision?
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