09. Metacharacters - The Character Class

• The character class in regular expressions have some special characters of their own that are metacharacters when used inside the class!
• For example, the dash character:

    -
          

  can be used inside a character class to specify a range, like this:

    [A-Z]
          

• This character class would match a single character from "A", "B", "C", ..., "Z".

• Similarly, the caret character:

    ^
          

  can be used to "negate" a character class, by placing it immediately after opening the class. For example, the character class:

    [^A-Z]
          

  would match a single character that was not from the range "A", "B", "C", ..., "Z".

• Remember, special characters like these have this meaning only when used inside a character class, and only in the right way!
• In a similar way, other metacharacters that we'll look at shortly are not metacharacters inside a character class - they behave like literal characters in between the square brackets!