C programming

In C programming, user-defined functions allow you to create modular and reusable code. To introduce a user-defined function, follow these steps:

Function Declaration:
Declare the function prototype at the beginning of your program or in a header file.This informs the compiler about the function's name, return type, and parameters.
// Function declaration
int addNumbers(int a, int b);
Function Definition:
Define the function by providing its implementation. This is where you specify what the function does.
// Function definition
int addNumbers(int a, int b) {
return a + b;
}
Function Call:
Call the function in your program whenever you need its functionality.
int result = addNumbers(5, 7);

Program.c

#include <stdio.h> // Function declaration int addNumbers(int a, int b); int main() { // Function call int result = addNumbers(5, 7); // Output the result printf("Sum: %d\n", result); return 0; } // Function definition int addNumbers(int a, int b) { return a + b; }

Output:
Sum: 12

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Q1. What is the main advantage of using user-defined functions in programming?question1

A.What is the main advantage of using user-defined functions in programming?

B.They make the code more complex and harder to understand

C.They limit the flexibility of the program

D. They can only be used for mathematical operations

Q2.What is a primary advantage of using user-defined functions for code maintenance? question2

A. They make it difficult to modify and update the code

B.They expose all the implementation details to the user

C. They encapsulate specific tasks, making it easier to modify and maintain code

D.They automatically handle errors and exceptions