13. Metacharacters: ^ and $

• Two very special metacharacter are caret and dollar:

    ^
    $
          

• These character match the beginning and the end of a line respectively.
• Hey, cool! Us vi users know that we can use caret to jump to the start of a line, and dollar to jump to the end of a line! Regexes are useful in editors as well!
• Okay, so what's so special about that?
• Well, so far, everything we've looked at has had to do with matching certain characters (or matching characters other than the one we've stated, in the case of negated character classes) - but these two are about matching certain positions in a line!