Within these castle walls be forged Mavens of Computer Science ...

— Merlin, The Coder

- It is customary to separate groups of three
**decimal**digits by commas. For example: 123,456_{10}. - It is customary to separate groups to two
**hexadecimal**digits by spaces and prefix a leading zero to what would otherwise be a single digit. For example: 01 2F_{16}. - It is customary to separate groups of three
**octal**digits by spaces and prefix leading zeros to pad to a three digit grouping. For example: 001 237_{8}. - It is customary to separate groups of four
**binary**digits by spaces and prefix leading zeroes to pad to a four digit grouping. For example: 0001 1011 1100_{2}.