如何在 JavaScript 中创建数学数字 1e6？
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How can I create the mathematical number 1e6 in JavaScript?
提问by TheBrent
How do I create the number 1e6 with JavaScript?
如何使用 JavaScript 创建数字 1e6？
var veryLargeNumber = //1e6
回答by Guffa
Here are some different ways:
这里有一些不同的方法：
var veryLargeNumber = 1e6;
var veryLargeNumber = 1.0e+06;
var veryLargeNumber = 1000000;
var veryLargeNumber = 0xf4240;
var veryLargeNumber = 03641100;
var veryLargeNumber = Math.pow(10, 6);
回答by Mahmoud Gamal
It is written the way you wrote it: var notVeryLargeNumber = 1e6.
它是按照你写的方式写的：var notVeryLargeNumber = 1e6。
回答by Sirko
This works just fine for me
这对我来说很好用
var veryLargeNumber = 1e6;
console.log( veryLargeNumber );
outputs:
输出：
1000000
1000000
For more information about really "large" numbers within JavaScript, have a look at this question:
有关 JavaScript 中真正“大”数字的更多信息，请查看以下问题：
回答by Danilo Valente
Like you wrote above:
就像你上面写的：
var veryLargeNumber = 1e6;//Equals to 1*10^6
回答by ptim
For the curious, I went on a little learning safari...
出于好奇，我进行了一些学习野生动物园......
Although the E stands for exponent, the notation is usually referred to as (scientific) E notation or (scientific) e notation
尽管 E 代表指数，但该符号通常被称为（科学）E 符号或（科学）e 符号
...
...
Because superscripted exponents like 10^7 cannot always be conveniently displayed, the letter E or e is often used to represent "times ten raised to the power of" (which would be written as "× 10n") and is followed by the value of the exponent; in other words, for any two real numbers m and n, the usage of "mEn" would indicate a value of m × 10n.
因为像 10^7 这样的上标指数不能总是方便地显示，所以字母 E 或 e 经常被用来表示“乘以 10 的幂”（可以写成“× 10n”），后面是指数；换句话说，对于任意两个实数 m 和 n，使用“mEn”表示 m × 10n 的值。
https://en.wikipedia.org/wiki/Scientific_notation#E_notation
https://en.wikipedia.org/wiki/Scientific_notation#E_notation
Use exponential notation if number starts with “0.” followed by more than five zeros. Example:
如果数字以“0”开头，请使用指数表示法。后面跟着五个以上的零。例子：
> 0.0000003
3e-7
http://www.2ality.com/2012/03/displaying-numbers.html
http://www.2ality.com/2012/03/displaying-numbers.html
Also: How to convert a String containing Scientific Notation to correct Javascript number format
另外：如何将包含科学记数法的字符串转换为正确的 Javascript 数字格式
Number("4.874915326E7") //returns 48749153.26
