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Questions and Answers
What does the line '#include <stdio.h>' accomplish in a C program?
What does the line '#include <stdio.h>' accomplish in a C program?
- It defines the main function of the program.
- It initializes the console input mechanisms.
- It includes the standard input-output library for functions like printf. (correct)
- It specifies the standard error library for file handling.
What is the purpose of the 'return 0;' statement in the main function?
What is the purpose of the 'return 0;' statement in the main function?
- It indicates successful termination of the program. (correct)
- It prints a message to the console.
- It interrupts the execution of the program.
- It defines the end of the main function.
Which statement is true about the execution of a C program?
Which statement is true about the execution of a C program?
- Execution starts from the first line of the included libraries.
- Execution of the program starts from the main function. (correct)
- Execution starts from any function declared in the program.
- Execution always begins from the printf statement.
In the statement 'printf("Hello, World!\n");', what does the '\n' signify?
In the statement 'printf("Hello, World!\n");', what does the '\n' signify?
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What will happen if 'return 0;' is omitted from the main function?
What will happen if 'return 0;' is omitted from the main function?
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Study Notes
Hello World Structure in C
- The
#include <stdio.h>directive imports the standard input-output library that allows the use of functions likeprintf. - Execution of a C program starts from the
int main()function, which serves as the entry point for the program. - The
printf("Hello, World!\n");function call outputs the string "Hello, World!" to the console. The\ncharacter creates a line break, moving the cursor to the next line. - Including
return 0;at the end of the main function signifies a successful termination of the program. The value0is returned to the operating system as a status code.
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Description
This quiz focuses on the essential structure of a C program, particularly the 'Hello, World!' example. It covers key components such as including libraries and the main function execution. Test your understanding of the basic syntax and functionality in C programming.
