• 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?
• 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?
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
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
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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