Function

A function in programming is a segment that groups a number of program statements to perform specific task.

A c program has at least one function [main()]. Without main(), there is technically no C program.

Types of Function

Basically, there are two types of functions in C on basis of whether it is defined by user or not.

·     Library Function
·         User Defined Function

Library Function

Library functions are the in-built function in C programming system.

For Example:

main()

- The execution of every C program starts from this main().

printf()

- prinf() is used for displaying output in C.

scanf()

- scanf()  is used for taking input in C.

Visit this page to learn more about library function in C programming.

User Defined Function

C provides programmer to define their own function according to their requirement known as user defined functions.