Functions

Functions :

A function is a block of statements which are created to perform a specific task.
Basically functions are of two types:

1.Library /predefined function

2.User defined function

Library /predefined function :

These are the in built ,or say,predefined function provided by programming language.

e.g.

printf(), scanf(), getch() etc

User defined function:

User defined functions are those which are created for the users for their own use. When ever a function is called in a program, control of the program jumps from main to that function body.

>>The main function is a user implemented function whose prototype(or say signature) is pre-defined by compilers.It tells compiler where to start to give a valid executable code to run.

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