Re: Can I tell if *DATA is exhausted? (eof, etc?)

<usenet@xxxxxxxxxxxxxxx> wrote in comp.lang.perl.misc:
> A. Sinan Unur wrote:
> > If you use a while loop, read line-by-line, you should observe only one
> > 1 being printed.
>
> True (I see '1" - one 1). But I still don't understand why I don't see
> '001' (as Anno reports with "for"). I don't understand why I see only
> "1", because if I say:

I reported "two false and one true values", not "001".

> #!/usr/bin/perl
> while (<DATA>) {
> print $_;
> }
> __DATA__
> 1
> 2
> 3
>
> I see "123". So if I "print eof" instead of "print $_" then why do I
> only see "1"? I seem to be very confused.

Perl's boolean "false" has a numeric value of 0, but a string value of
"". If you print it, you see the string, i.e. nothing. Print with
line feeds.

Anno
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