较大的负数上的Javascript parseInt给出NaN [英] Javascript parseInt on large negative number gives NaN

问题描述

当我这样做时:

var x = parseInt("–2147483648");
console.log(x);

我得到的值是:

NaN

为什么会这样?

我想测试数字是否在C(int)范围内，所以我在做上面的事情，但是不起作用.另外，我想对C(长整数)执行此操作，有办法吗?

I want to test if a number is in the range of C (int), so I am doing the above, but it does not work. Also, I want to do this for C (long), is there a way to this?

例如: 如果我这样做:

For example: If I do:

var x = parseInt("-9223372036854775808");
console.log(x);

现在，我知道(-+)2 ^ 53是Javascript中的数字限制.还有其他方法可以测试表格中的给定值是否在long或int范围内?

Now, I know that (-+)2^53 is the limit of numbers in Javascript. Is there some other way to test if the given value in a form is actually in the range of long or int?

推荐答案

它应该可以正常工作，问题是您使用了错误的字符，即ndash –与连字符-:

It should work fine, the problem is that you're using the wrong character, an ndash – vs a hyphen -:

var x = parseInt("-2147483648");
console.log(x);

如果您复制/粘贴，您会发现它现在可以使用.

If you copy/paste that you'll see that it works now.

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