计算常数E值 [英] Calculate constant E value

问题描述

我正在Objective-C中进行计算.我有一个值4.0468564224e-33.我不知道e常量的值是什么.请帮助我:如何计算该常数?在Objective-C中如何声明和计算常数值?

I am doing a calculation in Objective-C. I have one value 4.0468564224e-33. I dont know what that e constant's value is. Please help me: how can I calculate this constant value? How are constant values declared and calculated in Objective-C?

推荐答案

e是 scientific的一部分符号.

大多数计算器和许多计算机程序都以科学计数法表示非常大和非常小的结果.由于像10 ⁷ 这样的上标指数不能总是方便地在计算机，打字机和计算器上表示，因此通常使用另一种格式:字母 E 或 e 表示乘以的幂的十倍，因此替换了×10 ，后跟指数的值.请注意，字符 e 与数学常数 e (这种混淆不太可能与大写字母 E 相同)；尽管它代表指数，但通常将其称为(科学)E表示法或(科学)e表示法，而不是(科学)指数表示法(尽管后者也会发生).

Most calculators and many computer programs present very large and very small results in scientific notation. Because superscripted exponents like 10⁷ cannot always be conveniently represented on computers, typewriters and calculators, an alternative format is often used: the letter E or e represents times ten raised to the power of, thus replacing the × 10, followed by the value of the exponent. Note that the character e is not related to the mathematical constant e (a confusion that is less likely with capital E); and though it stands for exponent, the notation is usually referred to as (scientific) E notation or (scientific) e notation, rather than (scientific) exponential notation (though the latter also occurs).

4.0468564224e-33表示4.0468564224 * 10 ^-33 或0.0000000000000000000000000000000040468564224.

4.0468564224e-33 means 4.0468564224 * 10^-33, or 0.0000000000000000000000000000000040468564224.

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