README.md

Addition Function Program - C

This repository contains a simple C program that demonstrates the use of functions by adding two integers and printing the result.

What is a function ?

A Function is a piece of code which will not run by its own. But when called the code in the function will be executed to give some output.

#include <stdio.h>

int add(int a, int b){
        return a+b;
}

int main(){
        int result;
        result = add(5+4);
        printf("%d",result);
        return 0;
}

Function Prototypes

For writing a code more beautifuly we may utilize function prototypes.

In function prototypes the function is declared before the int main while the function be written below int main

This makes the code more readable

#include <stdio.h>

//this is a function prototype
int add(int a, int b);

int main(){
        int result;
        result = add(5+4);
        printf("%d",result);
        return 0;
}

int add(int a, int b){
        return a+b;
}

Explanation:

1. Function Declaration: The function add is declared at the beginning of the program with a signature int add(int a, int b);. This informs the compiler that a function named add will be used and that it takes two integer arguments and returns an integer.
2. Main Function: The main function calls the add function with arguments 5 and 10, stores the result in the sum variable, and then prints the result.
3. Function Definition: The add function is defined after the main function. It takes two integers a and b, adds them together, and returns the result.