c- language.

1. function:-

    it is a concept of modular programming consisting of instructions to carry out the specific task. in general concept the function after executing returns a single value to function called program.

• Advantage of function:-

     There are following advantages of functions.

1.By using function, we can avoid re-writting, same logic or code again and again in a program.

2.We can call c-functions any number of times in a program and from any place in a program.

3.We can track a large logic c-program easily when, it is divided into multiple function.

4.Reuseablity is the main benifit of function.

function is divided into two sub category:-

1. library function.

2. user defined function.