We have already seen how to read from standard input with
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$line = <STDIN>; # returning next line INCLUDING terminal newline
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@file = <STDIN>; # returning whole file with one line stored in each element of list @file
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We can also easily access the arguments of a PERL program. Suppose you invoke a PERL program makePHD with
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makePHD file1 file2 file3
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Then we will see later how to access individual files file1, file2, file3 using standard argument conventions in UNIX
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however the convention <> (Diamond Operator) will access the concatenation of the three files with all being read into array @argfiles with
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