I am using Getopt::Long. When passing a parameter via the command line, getopts seems to pass the parmeter on the cli followed by a 1 to the identified subroutine. I would be expecting, when the subroutine is called from the option passed from CLI, the parameters passed to the actual subroutine would be null/empty. when passing parameter to a subtroutine from within the script, the expected parameters are passed and printed. Any idea or assistance on how to achieve my expected results? 
#!/usr/bin/perl
use strict;
use Getopt::Long;

GetOptions ('demo' => \&demo,
            'test' => \&Test)
            
            or die("Error in command line arguments\n");
            
sub demo ()
{
    die "Wrong number of args" if (scalar(@_) != 2);
    my $arg0 = $_[0];
    my $arg1 = $_[1];
    my $arg2 = $_[2];
    my $arg3= $_[3];
    my $arg4 = $_[4];
    my $arg5 = $_[5];
    print "$arg0, $arg1, $arg2, $arg3, $arg4, $arg5\n";
}

sub Test () {
    # call the subroutine
    my $arg0 = $_[0];
    my $arg1 = $_[1];
    my $arg2 = $_[2];
    my $arg3= $_[3];
    my $arg4 = $_[4];
    my $arg5 = $_[5];
    print "$arg0, $arg1, $arg2, $arg3, $arg4, $arg5\n";
    &demo("hello", "world");
}

C:\temp>passparm.pl --demo
demo, 1, , , , <== would expect nothing to print

C:\temp>passparm.pl --test
test, 1, , , , <== would expect nothing to print
hello, world, , , , <== Expected

C:\temp>passparm.pl --demo --test
demo, 1, , , , <== would expect nothing to print 
test, 1, , , , <== would expect nothing to print
hello, world, , , , <== Expected

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In reply to Passing Parameters to subroutine by g_speran

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