perl -e "my $now = localtime time; print \"It is now $now \"; my $re= scalar localtime; print \"It is now $re \";" on Windows...
or, for a nix-ish OS...
perl -e 'my $now = localtime time; print "It is now $now"; my $re= scalar localtime; print "It is now $re";'
Go ahead. Try it. In fact, you can often answer your own questions, by such trials.
Or did you mean to ask a question that's not evident, such as "Does using scalar make a difference in the output? (Answer: not here) or "Does changing the variable's name make a difference?" (Answer: $now is certainly easier to understand than $re) or "Will one be quicker than the other?" (Answer: Benchmark it.)
And please, you've been here long enough to know that code -- even snippets like these -- should be wrapped in <c>...</c> tags.
Update: Fixed missing </p> tag; clarified phrasing of first question.
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