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ARGV

The special filehandle that iterates over command-line filenames in @ARGV. Usually written as the null filehandle in the angle operator <>. Note that currently ARGV only has its magical effect within the <> operator; elsewhere it is just a plain filehandle corresponding to the last file opened by <>. In particular, passing \*ARGV as a parameter to a function that expects a filehandle may not cause your function to automatically read the contents of all the files in @ARGV.