Understanding Main Function and Header Files in C | C Programming Tutorial in Hindi | Episode 3

Understanding Main Function and Header Files in C | C Programming Tutorial in Hindi | Episode 3

Welcome to Episode 3 of the C Complete Tutorial in Hindi by Karon Digital Academy! In this video, you will learn:

What is the main function in C programming
Importance of header files in C
How the preprocessor works in C
Commonly used header files like stdio.h, conio.h, math.h

This video is perfect for beginners who want to understand the structure of a C program and how header files work.

📌 C Programming Interview Questions & Answers

1. What is the main function in C?
The main function is the entry point of every C program. The execution of the program starts from here.

2. Why is the main function important?
Without the main function, the C compiler will not know where to begin executing the program.

3. What is a header file in C?
A header file in C contains predefined functions and macros that can be used in a program. It helps in code reusability and makes programming easier.

4. Why do we use header files?
To use built-in functions like printf and scanf
To include predefined constants and macros
To improve code organization and reusability

5. What are some commonly used header files in C?
stdio.h: Standard Input-Output functions like printf and scanf
conio.h: Console input-output functions like getch and clrscr
math.h: Mathematical functions like sqrt, pow, abs
string.h: String functions like strlen, strcpy, strcat
stdlib.h: General functions like memory allocation (malloc, free)

6. How do you include a header file in C?
You can include a header file using the #include directive

7. What happens if you don't include a required header file?
If you try to use a function that requires a specific header file, the compiler will show an error because it does not recognize the function.

8. What is the difference between a system-defined and a user-defined header file?
System-defined header files are built into C and included using angle brackets
User-defined header files are created by programmers and included using double quotes

Watch the Full Playlist: C Complete Tutorial in Hindi | Learn C Programming from Scratch to Advanced (https://www.youtube.com/playlist?list=PL2Hrlzy7mjGCHjMXt6laPMBQ4AQ81_eFG)

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Видео Understanding Main Function and Header Files in C | C Programming Tutorial in Hindi | Episode 3 канала Karon Digital Academy