Library Functions are pre-defined built-in functions that are permanently stored in the library of C compiler

Library Functions are pre-defined built-in functions that are permanently stored in the library of C compiler.

Select one: A. True B. False

The correct answer and explanation is:

Correct Answer: A. True

Explanation:

Library functions in the C programming language are indeed pre-defined built-in functions that are permanently stored in the library of the C compiler. These functions are provided by the creators of the C language to help programmers perform common tasks more efficiently without the need to write the code from scratch.

What are Library Functions?

Library functions are ready-to-use functions grouped in header files (like stdio.h, math.h, string.h, etc.). Examples of common library functions include:

• printf() and scanf() for input/output operations (in stdio.h)
• strlen(), strcpy() for string handling (in string.h)
• sqrt(), pow() for mathematical computations (in math.h)

Why Use Library Functions?

1. Saves Time: You don’t need to manually code complex functionality.
2. Reliable: These functions are thoroughly tested and optimized.
3. Portability: Code using standard library functions works across different platforms and compilers.

How They Work:

To use a library function, the relevant header file must be included at the beginning of the C program using the #include directive. For example:

#include <stdio.h>

int main() {
    printf("Hello, World!");
    return 0;
}

Here, printf() is a library function that prints text to the screen and is defined in the stdio.h library.

Conclusion:

Thus, the statement that “Library Functions are pre-defined built-in functions that are permanently stored in the library of C compiler” is True. These functions form an essential part of C programming, allowing developers to write efficient, reliable, and standardized code.