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 6.1.4 The `BEGIN' and `END' Special Patterns
 --------------------------------------------
 
 All the patterns described so far are for matching input records.  The
 `BEGIN' and `END' special patterns are different.  They supply startup
 and cleanup actions for `awk' programs.  `BEGIN' and `END' rules must
 have actions; there is no default action for these rules because there
 is no current record when they run.  `BEGIN' and `END' rules are often
 referred to as "`BEGIN' and `END' blocks" by long-time `awk'
 programmers.
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