25. Metacharacters - Review

• So, now we know all about:
  1. Use of [ and ] to create character classes
  2. Using ^ and - inside character classes to negate the class, or create a range
  3. Use of | to provide alternation
  4. Use of ( and ) to limit the scope of alternation
  5. Use of ^ and $ to match the beginning and the end of a line
  6. Use of . to match "any" character
• As well as:
  1. The ?, *, + and {min, max} quantifiers