C Programming Functions

In programming, a function is a segment that groups code to perform a specific task.
A C program has at least one function main( ). Without main() function, there is technically no C program.

Types of C functions

There are two types of functions in C programming:

• 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() function.

printf()

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

scanf()

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