Using the javascript function
使用javascript函数
function squareIt(number) {
return number * number;
}
When given the number 4294967296 the function returns 18446744073709552000 is returned
当给出数字4294967296时，返回函数返回18446744073709552000
Everyone knows the real answer is 18446744073709551616 :-)
大家都知道真正的答案是18446744073709551616 :-)
I guess this is to to with rounding on my 32-bit machine. However, would this script give the right answer on a 64 bit machine? Has anyone tried this?
我想这是在我的32位机器上进行舍入。但是，这个脚本会在64位机器上给出正确答案吗？有没人试过这个？
3 个解决方案
#1
3
ChrisV- see this post. Also it easier for people to evaluate your question by typing the following JavaScript directly into the browser URL textbox:
ChrisV-看到这篇文章。此外，通过直接在浏览器URL文本框中键入以下JavaScript，人们可以更轻松地评估您的问题：
javascript:4294967296*4294967296
#2
1
Javascript uses 64 bit floating point arithmetic internally for numerical calculations - the results you see are a reflection of this, and will happene regardless of the underlying architecture.
Javascript在内部使用64位浮点运算进行数值计算 - 您看到的结果是对此的反映，并且无论底层架构如何都会发生。
#3
1
what about this
那这个呢
function squareIt(number){
return Math.pow(number,2)
}
#1
3
ChrisV- see this post. Also it easier for people to evaluate your question by typing the following JavaScript directly into the browser URL textbox:
ChrisV-看到这篇文章。此外，通过直接在浏览器URL文本框中键入以下JavaScript，人们可以更轻松地评估您的问题：
javascript:4294967296*4294967296
#2
1
Javascript uses 64 bit floating point arithmetic internally for numerical calculations - the results you see are a reflection of this, and will happene regardless of the underlying architecture.
Javascript在内部使用64位浮点运算进行数值计算 - 您看到的结果是对此的反映，并且无论底层架构如何都会发生。
#3
1
what about this
那这个呢
function squareIt(number){
return Math.pow(number,2)
}