Add information about unary 'd'

1 files changed, 3 insertions, 0 deletions

diff --git a/README.md b/README.md
index 0ad6988..e2474b3 100644
--- a/README.md
+++ b/README.md
@@ -36,6 +36,7 @@ games are supported. You can do things like:
 
 * `XdY`: rolls `X` `Y`-sided dice (`1d6` is a single 6-sided die, `2d4` is two
   4-sided dice).
+* `dX` is the same as `1dX` (so you can shorten `1d6` to `d6`).
 * `dice +/- constant`: rolls the dice, adds/subtracts the constant.
 * `dice +/- moreDice`: sums/takes the difference of the results of rolling
   `dice` and `moreDice`.
@@ -51,6 +52,7 @@ ignored):
     Die ::= <an integer>
           | '(' Die ')'
           | Die 'd' Die
+          | 'd' Die
           | Die '+' Die
           | Die '-' Die
           | '-' Die
@@ -64,6 +66,7 @@ Semantics are defined in terms of the `pool` function.
   equal to the result of rolling `E`. `pool` returns an array of `roll(D)`
   numbers, each between 1 and `roll(E)`. *Note:* if `D` or `E` evaluates to a
   negative number, the behavior is undefined.
+* `dD` is equivalent to `1dD`.
 * `D+E` appends the dice pool generated by `E` to the dice pool generated by
   `D`.
 * `-D` returns the opposites of values generated by `D`.