What is method in oop? like c++,Java

1. Method
MD. NADIMOZZAMAN PAPPO

2. What is Method?
 A block of instructions/codes defined as -
On procedural language(C) – a Procedure
On OOP(C++,Java) – a procedure associated with an object class
 OOP - Specifically an objects behavior

3. How to declare a Method?
 Return type
 Method Name
 Arguments
 Method Body
 Structure:
return_type method_name(argument list){
instruction 1;
………….
Method Body
………….
Instruction n;
}

4. Method in Procedural Languages - C
 They are called - Function
 Return type – void, int, double etc
 Function naming, Arguments, Method
Body
 Receive parameters from caller
 Perform the operations defined on
body
 Return result or void to the caller

5. Method in OOP – C++,Java
 Characteristics –
Access specifier, Modifier, Return-
type, Method name, Parameter list,
Prototyping, Method body
 Acts like objects behavior
 Also called Member Functions
 Receive parameters from caller
 Perform the operations defined on
body
 Return result or void to the caller

6. Why use Methods?
 Reusability, Portability
 Creating abstraction/ conceptual unit
 Methods can be called recursively
 Code readability
 To simplify

7. Method Example in C

8. Method Example in C++ & Java

9. Famous Methods- C,C++,Java
 Main function
 Constructor
 Abstract Methods
 Virtual Method