The document presents an overview of programming fundamentals, specifically focusing on functions, which are named blocks of code that perform actions when called. It discusses function components, types (built-in and user-defined), advantages, calling methods, and the basic syntax related to function definitions and prototypes. Additionally, it distinguishes between local and global functions in terms of their scope and usage.

1. Welcome to the
presentation of
Programming
Fundamental
Presented by
Muhammad Bilal
Muzammil Bashir
Abuzar Mumtaz

2. Function
Function is a named block of code
that perform some action.
Statement written in function
executed when it is call by its name.
Each function has its unique name.

3. Function

4. Return-type:-
 It indicates the type of value that will returned by
function.
 For example : int is used as a return type if function return
integer value.
 If function returns no value then the keyword void is used.
Function-name:-
 It indicates the name of function.
Parameters:-
 Parameters are the values that are provided to function
when function is called.

5. Function Types
 There are two types of function :
1. Built-in function
2. User-define function

6. Function types
Build in functions that available as a
part of language. Like getch(); etc.
User define function that written by
programmer.
Function consist of two parts :
1. Function body.
2. Function header.

7. Function call

8. Function advantages
There are many advantages
to use functions:
Easy to code.
Easy to maintain and
debug.
Reusability.
Less programming time.

9. Function
Function
call by three
ways:
By name.
By
reference.
By value.

10. Function definition
Set of statements that explain that
what function does is called
function definition.
It can be written in following
places:
Before main function.
After main function.
In separate file.

11. Function Prototype
Function prototype also called
function header.
The first line of function definition is
called function header.
Basic syntax is:
Return-type function-name
(parameters)

12. Function prototype
Basic syntax

13. Function call
 Statement that
active a function
is called function
call.
 When function is
called control
move to function
that is called and
return back to
calling function.

14. Function
Basic syntax

15. Local Function
 Local functions are a form
of information hiding and
they are useful for dividing
procedural tasks into
subtasks.
 It is also called nested
function.

16. Global Function
Global function refers to a set of
shared information within the
system include tasks like data
recovery and data transfer etc.
They have global scope.

17. Functions

18. Thanks …