Command-line parameters are sent to a Perl program in the same way they're sent to any other. 
% ./myprog foo bar blat

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The @ARGV array holds the command-line arguments, and in this case, it would hold ('foo', 'bar', 'blat').

Perl allows for simplistic command-line options via the -s option to perl: 
#!/usr/bin/perl -s

print "value of -x: $x\n";
print "value of -name: $name\n";

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Here's a sample run: 
% ./myprog -x -name=Jeff
value of -x: 1
value of -name: Jeff

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If you want more complex option parsing, there are two standard modules that can do this for you: Getopt::Std and Getopt::Long.

Perl allows you to treat the arguments in @ARGV as filenames, by using the special case of the <> operator. 
while (<>) {
  # $ARGV is the filename
  # $_ is the line
  # $. is the line number
    # reset it to 0 by doing
    # $. = 0 if eof;
    # or
    # close ARGV if eof;
}

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In reply to Re: How do you use command line parameters? by japhy
in thread How do you use command line parameters? by BlackShift

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