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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 C language, header files are used to organize and reuse code efficiently 6 Key uses of header files in C language are :1. Function declarations (Prototypes)2. Macro Definitions3. Type Definitions4. Structure Declarations5. Code Reusability6. Modularity
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In C language, header files are used to organize and reuse code efficiently 6 Key uses of header files in C language are :1. Function declarations (Prototypes)2. Macro Definitions3. Type Definitions4. Structure Declarations5. Code Reusability6. Modularity read less
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declare functions, variables, and other identifiers that are used in a program.
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help organize code by separating the implementation (in source files) from the declarations (in header files).
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Header files declare functions, macros, and constants, allowing code reuse and modularity (e.g., #include ).
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A header file in C is a file with extension .h that contains declarations of functions, macros, constants, and data types which can be shared across multiple source (.c) files.
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A header file in C is a file with extension .h that contains declarations of functions, macros, constants, and data types which can be shared across multiple source (.c) files. read less
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Worked as Software Developer. I have experience in python and java programming.

Header files contain function declarations, constant declarations. It is used to share code between different source files. It makes the program modular and organized.
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It is used to perform error handling operations like errno(), strerror(), perror(), etc. It contains a set of various platform-dependent constants related to floating point values. These constants are proposed by ANSI C. They make programs more portable.
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It is usedto perform error handling operations like errno(), strerror(), perror(), etc. It contains a set of various platform-dependent constants related to floating point values. These constants are proposed by ANSI C. They make programs more portable. read less
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