## Range patterns

In patterns, Caml Light recognizes the form ``` c ``` `..` ``` d ``` (two character constants separated by `..`) as a shorthand for the pattern

> ``` c ``` `|` ``` c1 ``` `|` ``` c2 ``` `|`...`|` ``` cn ``` `|` ``` d ```

where c_1, c_2, ..., c_n are the characters that occur between c and d in the ASCII character set. For instance, the pattern ``0`..`9`` matches all characters that are digits.