(gawk.info)BEGIN/END

The `BEGIN' and `END' Special Patterns
--------------------------------------

   `BEGIN' and `END' are special patterns.  They are not used to match
input records.  Rather, they supply start-up or clean-up actions for
your `awk' script.



* Using BEGIN/END
How and why to use BEGIN/END rules.
* I/O And BEGIN/END
I/O issues in BEGIN/END rules.