return 1 if $status == 0;
return; # a return by itself implicitly returns an empty list
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It's true that return by itself returns an empty list in list context. But it returns undef in scalar context -- not   scalar( () )! ;)

Updated: Simply added a quote of what I was refering to, since the thread grew quite long. Improved punctuation to boost readability. Removed unneccesary extra link to return.