多少位，你需要存储多少？ [英] How many bits do you need to store a number?

问题描述

您将有多少位需要存储一些例如在数十亿美元。你必须使用LOG2 N至发现这一点？

How many bits would you need to store a number for example in the billions. Would you have to use the log2 N to find this out?

推荐答案

因为我已经看到了答案报道不正确，因此很多时候，我以为我会张贴了正确的答案。

Since I've seen the answer reported incorrectly so many times, I thought I would post the correct answer.

重新present的正整数n是需要的比特数目

The number of bits needed to represent the positive integer n is

bits = floor( log2(n) + 1 )

在这里LOG2意味着日志基地2。

where log2 means log base 2.

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