What does # mean in C?

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Abhay Gupta

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Statement beginning with # are for prepocessor and such statements are called as prepocessor directives These statements are processed by prepocessor before Compilation process by compiler. It is generally used to include library files along with your code and link the file with your program For...
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Statement beginning with # are for prepocessor and such statements are called as prepocessor directives These statements are processed by prepocessor before Compilation process by compiler. It is generally used to include library files along with your code and link the file with your program For example if you write #include It means you are linking a header file stdio.h You need to include this file because all input and out function are defined in stdio.h read less
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In C, the # symbol is used for preprocessor directives. These directives are instructions to the preprocessor, which is a tool that processes the source code before actual compilation. For example, #include is used to include header files, and #define is used for macro definitions.
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Engineering background teacher with 5+ years of teaching experience.

In C, the # symbol is used in the context of preprocessor directives. The preprocessor is a part of the C compiler that processes the source code before actual compilation begins. # is used to indicate preprocessor directives, which are instructions for the preprocessor.
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In the C programming language, the '#' symbol indicates the initiation of a preprocessor directive. These directives are executed prior to the compilation of the code, resembling a process of modifying your source code through specific text substitutions and other operations.
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