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j壁10强的倍数和分数价值
原标题:multiply and divide values with power of ten in javascript
  • 时间:2011-08-31 04:50:48
  •  标签:
  • javascript

• 如何区分10 of带力量的价值?

例如:

-5x10^-3 * 3x10^-9

这样做有办法。

Math.powof(5,-3)

something like that?

最佳回答

为什么不使用权宜之计?

-5e-3 * 3e-9

相当于:

-0.005 * 0.000000003;

请注意,在处理小小小小小小小小小小小小小小小小小小小小数时,算术可能并不准确,例如。

(-5 * Math.pow(10, -3)) * (3 * Math.pow(10,-9)) // -1.5000000000000003e-11

......

-5 * Math.pow(10, -3) * 3 * Math.pow(10,-9)  // -1.5e-11
问题回答

你可以尝试:

5 × Math.pow(10,-3)

几乎是Math.pow(x, y)的,X应被赋予权力,这样就把它纳入你们所需要的任何方程式。

参看https://developer.mozilla.org/en/Java/Reference/Global_Objects/Math/pow” rel=“nofollow”>,Math.pow(base,exponent),其中请上:code>。 你可以做这样的事情:

function powOf10(num,exp) {
   return num * Math.pow(10,exp);
}

alert(powOf10(5,-3));

这里是例子,但主要功能却不理解,而是看着你们会得到的希望。

(Math.pow((-5*10),-3)) * (Math.pow(3*10),-9)

or

(-5 * Math.pow(10,-3)) * (3 * Math.pow(10),-9)




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