Example of user define function with argument and return value in C programming.

Introduction: 

Functions are a fundamental building block of any programming language. They allow us to break down a program into smaller, more manageable pieces, making it easier to read, debug and maintain. In C programming, we can create our own functions, known as user-defined functions, which can take arguments and return values. In this article, we will explore the concept of user-defined functions with arguments and return values, and provide an example of how to create one.

User-Defined Functions with Arguments and Return Values:

A user-defined function is a function that is created by the programmer and not built into the programming language. These functions can take arguments, perform calculations or operations, and return a value. The syntax for creating a user-defined function with arguments and a return value in C programming is as follows:

Syntax:

return_type function_name(argument1, argument2, ..., argumentN) 

{ 

// function body return expression; 

}

Here, the return_type is the data type of the value that the function will return. The function_name is the name of the function, and the arguments are the variables that will be passed to the function. The function body contains the code that performs the desired operation, and the expression is the value that the function will return.

Example: 

Let's consider an example of a user-defined function with arguments and a return value that calculates the average of two numbers. The code for this function would be:

#include <stdio.h>

float average(float num1, float num2) 

{

    float avg = (num1 + num2) / 2;

    return avg;

}

int main() 

{

    float x, y, result;

    printf("Enter two numbers: ");

    scanf("%f %f", &x, &y);

    result = average(x, y);

    printf("Average = %f\n", result);

    return 0;

}

In the above example, we create a user-defined function called average, which takes two float-type arguments, num1 and num2. The function calculates the average of the two numbers and returns the value as a float. In the main function, whe coe ask the user to input two numbers, and we call the average function, passing the two numbers as arguments. The function calculates the average and returns the result to the main function, where we print it to tnsole.

Output:

Conclusion:

User-defined functions with arguments and return values are a powerful feature of the C programming language. They allow us to break down complex tasks into smaller, more manageable pieces, and make our code more efficient, readable, and maintainable. In this article, we have provided an example of how to create a user-defined function that takes arguments and returns a value. By practicing and using user-defined functions, you can become a more efficient and skilled C programmer.

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