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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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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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