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7.3: Do I always/never have to quote my strings or use semicolons and commas?

Normally, a bareword doesn't need to be quoted, but in most cases
probably should be (and must be under "use strict"). But a hash key
consisting of a simple word (that isn't the name of a defined
subroutine) and the left-hand operand to the "=>" operator both count as
though they were quoted:

This is like this
------------ ---------------
$foo{line} $foo{'line'}
bar => stuff 'bar' => stuff

The final semicolon in a block is optional, as is the final comma in a
list. Good style (see perlstyle) says to put them in except for

if ($whoops) { exit 1 }
@nums = (1, 2, 3);

if ($whoops) {
exit 1;

@lines = (
"There Beren came from mountains cold",
"And lost he wandered under leaves",


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