By default, the standard input stream stdin points to the keyboard, while the standard output stream stdout and the standard error stream stderr point to the screen.

the verdict

SUPPORTED

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Recorded sources

4 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

AS REPORTEDno primary record reached; this is what the reporting says

Is it true that by default, the standard input stream stdin points to the keyboard, while the standard output stream stdout and the standard error stream stderr point to the screen?

Yes. By default in standard computing environments, standard input (stdin) comes from the keyboard, while standard output (stdout) and standard error (stderr) point to the screen.

Verdict: SUPPORTED · 4 sources for, 0 against · Last checked 4 Oct 2026

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Evidence for · 4

Wikipedia: Standard streams

Reference article covering this claim directly

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Wikipedia: Standard streams. (n.d.). Wikipedia. https://en.wikipedia.org/wiki/Standard_streams

2 recorded entries grouped as this source

Additional records of the same source are shown below. They are not counted as additional sources.

Wikipedia: Wikipedia: Standard streams

Explains standard streams connect to terminal/console by default, originating from keyboard and monitor.

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Wikipedia: Wikipedia: Standard streams. (n.d.). Wikipedia. https://en.wikipedia.org/wiki/Standard_streams

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More for · 3

LibreTexts: LibreTexts: 5.08: File Output Manipulation

Confirms STDIN usually comes from keyboard, while STDOUT and STDERR send data to the display by default.

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LibreTexts: LibreTexts: 5.08%3A File Output Manipulation. (n.d.). LibreTexts. https://eng.libretexts.org/Bookshelves/Computer_Science/Operating_Systems/Linux_-_The_Penguin_Marches_On_(McClanahan)/05%3A_File_and_Directory_Management/5.08%3A_File_Output_Manipulation

Wikibooks: Wikibooks: A Quick Introduction to Unix/Files and Processes

Explains default output stdout is displayed on screen, and standard input is the keyboard.

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Wikibooks: Wikibooks: A Quick Introduction to Unix/Files and Processes. (n.d.). Wikibooks. https://en.wikibooks.org/wiki/A_Quick_Introduction_to_Unix/Files_and_Processes

Wikiversity: Wikiversity: Operating Systems (Hands-On)/Case Study Unix

Explicitly states that STDIN comes from the keyboard and STDOUT and STDERR point to the screen.

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Wikiversity: Wikiversity: Operating Systems (Hands-On)/Case Study Unix. (n.d.). Wikiversity. https://en.wikiversity.org/wiki/Operating_Systems_(Hands-On)/Case_Study_Unix

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