There are 2 types of function in C Language:
a. Built in Function:
This is predefined by Language. Means already written, compiled and tested and stored in c library files.
User just used them in programme.
b. User Defined Function:
This function is developed by user at a time during coding. They are not stored in any file.
To learn more in detail about C Language at TCCI.
Call us @ 9825618292
Visit us @ http://tccicomputercoaching.com/