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C Language > Learn C Language > What is the use of header files in C language?
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What is the use of header files in C language?

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In the C programming language, header files play a crucial role in organizing code, facilitating modular programming, and enabling better code reusability. Header files contain declarations of functions, variables, data structures, macros, and other entities that are used in multiple source code files....
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In the C programming language, header files play a crucial role in organizing code, facilitating modular programming, and enabling better code reusability. Header files contain declarations of functions, variables, data structures, macros, and other entities that are used in multiple source code files. They are typically used in conjunction with source code files to provide information about the interfaces and functionalities of various components of a program. read less
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I have 10 years experience in teaching C, C++, Java, Python, tally, Ms-Excel, SQL.

Header file - having pre defined function. when we include the header file then only we can use the keyword Example #include<stdio.h> - it includes standard input and output keys
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