Is it necessary to mention the header files in the C programming language?

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Maths Tutor

It is absolutely necessary as without inclusion of the same to your program, will lead to the absence of library functions that are present in the header files, your program will have a syntax error.
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Maths Tutor

yes
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Tutor

Yes, so that compiler can compile coding
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Result Oriented classes in C++, C, Data Structure and Maths

yes , it is necessary.you can create your own header file which includes all the header files
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Augmented Reality,Virtual Reality, Game Development

Yes! if the programmer is intend to use the functions from the header it is a must to use the header. One cannot understand a Korean movie without a English subtitle.
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Yes
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Tutor

Yes because C language depends on a set of 'foundation' functions without which you cannot do even the most basic of tasks. There are other programming languages which dont require header files compusorily, because you can define the functions yourself if you want. Header files were created to make your...
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Yes because C language depends on a set of 'foundation' functions without which you cannot do even the most basic of tasks. There are other programming languages which dont require header files compusorily, because you can define the functions yourself if you want. Header files were created to make your program shorter and easier to read. read less
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It is necessary to assign the length of a char array , it cannot be left undeclared , unless you define the array in the first go or you declare it as a pointer
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Yes
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Tutor of C, Core Java, having 5 years of development experience in DRDO, Bangalore and Honeywell

If you are not including any header file than also your program will run completely but the condition is that you have to make all the functions by yourself, like printf and scanf functions. We use these functions and include header files in our programs to reduce their complexity as well as they also...
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If you are not including any header file than also your program will run completely but the condition is that you have to make all the functions by yourself, like printf and scanf functions. We use these functions and include header files in our programs to reduce their complexity as well as they also save our time. read less
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