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Asked: 2026-05-13T19:08:08+00:00

I read about standard streams . My understanding is old fashioned programs that don’t

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I read about standard streams. My understanding is old fashioned programs that don’t have GUI need some kind of user interface, too. So Operating System provide each of them with a console window, and the console window’s out/input/err stream was mapped to the program’s standard input/output/error stream. And thus these programs are called console application. And this mappings couldn’t be modified by the programmer.

I am wondering, if my understanding above is correct, does GUI program have these standard streams also? I don’t think it’s necessary since GUI itself is a good user interface.

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  1. Editorial Team

    I’m quoting the bottom of the article you linked to:

    Graphical user interfaces (GUIs)
    rarely make use of the standard
    streams.

    Some GUI programs, primarily on Unix,
    still write debug information to
    standard error.

    Others may take files to operate from
    standard in, for example many Unix
    media players do so.

    Therefore from the above quotes, you can see that yes they do, although they’re rarely used.

    "And this mappings couldn’t be
    modified by the programmer."

    This is incorrect – certainly on UNIX they can be – not sure about Windows. For example, you can close the standard output stream and redirect it to a file stream to get the output written to a file.

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