Often

dice are written using the

lowercase `

d'. It still causes no confusion with

differentials, because a

digit follows rather than a

variable.

The full notation is more expressive:

`1d6+3` means to roll a 6-sided die and add 3 to the result (between 4 and 9).
`3d6` means to roll a 6-sided die 3 times and add up the results (note that this is *not* algebra's shorthand for multiplication!). The result follows approximately a normal distribution.
- Combining,
`2d6-5` means to sum up the results of rolling 2 6-sided die, then subtract 5 (result is between -3 and 7).
- D&D also has a 10-sided die, so
`d10` also makes sense. And `d100` or `d00` is a percentage roll: roll the 10-sided die once for the tens digit, then once for the units digit