When I do this:

var x = parseInt(–2147483648);

console.log(x);

I get the value as:

NaN

Why does this happen?

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?

For example:
If I do:

var x = parseInt(-9223372036854775808);

console.log(x);

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?