为什么二进制数几乎总是按 4 位分组？

Question

我正在学习 ARM，因此回到二进制/十六进制算术的基础知识，这让我开始思考二进制数通常如何以 4 为一组呈现，例如

1111 1110 1101 1100

Is there a particular reason why it's done this way? Seeing as we normally describe memory in terms of bits/bytes/megabytes etc I'd have thought they'd be better grouped by 8?

Answer 1

One reason is that it becomes easy for representation and conversion into Hexadecimal. One Hexadecimal Digit consists of (represents) 4 bits.