FAQ 8.7 How do I clear the screen?

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This is an excerpt from the latest version perlfaq8.pod, which
comes with the standard Perl distribution. These postings aim to
reduce the number of repeated questions as well as allow the community
to review and update the answers. The latest version of the complete
perlfaq is at http://faq.perl.org .


8.7: How do I clear the screen?

    If you only have do so infrequently, use "system":


    If you have to do this a lot, save the clear string so you can print it
    100 times without calling a program 100 times:

            $clear_string = `clear`;
            print $clear_string;

    If you're planning on doing other screen manipulations, like cursor
    positions, etc, you might wish to use Term::Cap module:

            use Term::Cap;
            $terminal = Term::Cap->Tgetent( {OSPEED => 9600} );
            $clear_string = $terminal->Tputs('cl');


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Re: FAQ 8.7 How do I clear the screen?

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Which of course only works on those systems with a 'clear' command
that does what you want.

This answer should be noted as being system-specific, and unless
there's a mechanism that works [almost-]everywhere Perl does, the
question should also be so noted.

Quoted text here. Click to load it

On Windows-ish systems, where there is no 'clear' command, there is a
'cls' command; it has historically been users of these systems who
write programs that clear the screen (and ask how to do it in
language-specific newsgroups).  Nowadays with windowing systems
ubiquitous and screen real-estate increasing, perhaps the answer
should be more like


        You really want to?
        OK, clarify what you mean by "screen":
        - a text window of fixed size?
        - a text window of arbitrary, possibly variable, size?
        - a graphical window?
        - every pixel displayed on one monitor?
        - every pixel displayed on every monitor in front of one user?
        - something else?

        Some of these are easy, some less so.
        Some of these may be desirable, some less so.


Re: FAQ 8.7 How do I clear the screen?

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Anything that uses system() is system specific :)

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