What does `.` match?

In regular expressions, the dot (.) is a special character that matches any single character except for newline characters (like \n). This makes it a versatile tool for creating patterns that can match various characters in a string.

Example:

• The regex a.b would match:
  • aab
  • acb
  • a1b

But it would not match:

• ab (missing a character between a and b)
• a\nb (because of the newline)

If you have more questions about regular expressions or need examples, feel free to ask!