---
title: "Discussion on \"What #include, #define and others really do in your C Program\" | Hashnode"
description: "Discussion on \"What #include, #define and others really do in your C Program\". This is a clear explanation of why we use the hash symbol (#) in C programming and what it helps the program to do. Preprocessor Directives are covered also"
url: "https://hashnode.com/posts/understanding-preprocessor-directives-in-c-programming/643e4aff4ed9bfdc5308674d"
---

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# [What #include, #define and others really do in your C Program](https://blog.devbrightly.com/understanding-preprocessor-directives-in-c-programming?utm_source=hashnode&utm_medium=feed)

This is a clear explanation of why we use the hash symbol (#) in C programming and what it helps the program to do. Preprocessor Directives are covered also

Apr 18, 2023 · 4 min read · blog.devbrightly.com  
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-   [#c-programming](https://hashnode.com/tag/c-programming)
-   [#c](https://hashnode.com/tag/c)
-   [#preprocessor](https://hashnode.com/tag/preprocessor)
-   [#include](https://hashnode.com/tag/include)
-   [#preprocessor-directives](https://hashnode.com/tag/preprocessor-directives)

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