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 A.4 Extensions in Brian Kernighan's `awk'
 =========================================
 
 Brian Kernighan has made his version available via his home page (
 Other Versions).
 
    This minor node describes common extensions that originally appeared
 in his version of `awk'.
 
    * The `**' and `**=' operators ( Arithmetic Ops and 
      Assignment Ops).
 
    * The use of `func' as an abbreviation for `function' (
      Definition Syntax).
 
    * The `fflush()' built-in function for flushing buffered output
      ( I/O Functions).  As of December 2012, this function is
      now standardized by POSIX.
 
 
     Common Extensions, for a full list of the extensions
 available in his `awk'.
 
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