For simplicity we divide our code into small pieces / modules known as functions. To use functions in C programming we need to define function prototype, function definition and finally we call the function to perform that functionality. Here we will define a simple sum function, which will accept 2 numbers as an input and will return sum of these numbers. [js] #include <stdio.h> int sum(int x, int y); // this is prototype of our sum function. int main(void){ // for simplicity we divide our code into small pieces / modules known as functions // to use functions in C programming...
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