Greetings Wiseones - I am confused by the differences between these 3 different ways of pulling information from caller:

First -

my ($package, $filename, $line) = caller;
print qq[Problem in $filename at line $line\n];
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Second -

my @caller = caller(0);
print qq[Problem in $caller[1] at line $caller[2]\n];
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Third -

my $filename = (caller(0))[1];
my $line = (caller(1))[2];
print qq[Problem in $filename at line $line\n];
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My main question revolves around what the parentheses do around caller: (caller(0))[1].

Thanks for the help.