Wildcards:
You can use wildcards to match a set of characters.
Examples:
| Wildcard | Description |
|---|---|
| . | Any single character |
| (hello|world) | Either 'hello' or 'world' |
| [1-6] | A number between 1 and 6 |
| [c-h] | A lower case character between c and h |
| [D-M] | An upper case character between D and M |
| [^a-z] | Absence of lower case a to z |
| [adx] | One of the characters a, d or x |
| [a-z13] | a lower case character or 1 or 3 |