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Regarding EOF in C

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I have read that in Linux, user can do CTRL+D and it's leads to equivalent, but I have an question that user has to press CTRL+D or write CTRL+D in program like a character.
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In Linux user has to press Ctrl +D. It depends whether you are working in one of the editors such as gedit which is basically has a GUI. However, whether the code is written in vi editor which is terminal based or any other editor all commands/programs are executed in the terminal. You have to explicitly press Ctrl +D. It is not a character. Also if you want to exit from the current process/ command you can press Ctrl +Z. You don't need to write anything. Just press it. Yeah. Still, if you haven't understood then go through the comments and take up the discussion. :).Hope it helps u. :)
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