In c, we can divide a large program into the basic building blocks known as function. The function contains the set of programming statements enclosed by {}. A function can be called multiple times to provide reusability and modularity to the C program. In other words, we can say that the collection of functions creates a program. The function is also known as procedureor subroutinein other programming languages.
Advantages
● By using functions, we can avoid rewriting same logic/code again and again in a program.
● We can call C functions any number of times in a program and from any place in a program.
● We can track a large C program easily when it is divided into multiple functions.
Reusability is the main achievement of C functions.
● However, Function calling is always a overhead in a C program.
