Skip to main content

C++ Function or Method Beginner Programming

C++ functions or Methods

A function is a set of different statements which is use to perform a specific task.

 compiler knows that every name with () bracket is a function.

 In this lecture we'll discuss built-in functions and user define functions.
functions provided by C++ are called built-in functions Math() ,rand()etc.
functions written by programmer In C++ program to perform a specific task depends on programmer requirements like addition between 2 or more numbers are known as User Define functions.

 In C++ program there is at least one function,which is main() function. main() is the main entry point of a program when we run or debug a program C++ compiler looks for main function to execute whole program statements.

 functions use to divide and organize our program in different functions which is helpful for finding errors if any appear during programming.
we declare a function using return type, function name and parameters.
Syntax of declaring function is very simple

returnType functionName (int parameter)
{
  // function statements
}
ReturnType
return type of a function tells compiler that what kind of value this function is going to return for example if we use int as a return type of a function it'll return an integer value. void return nothing.
FunctionName
programmer define name of a function and parameters to make a function signature.
Parameter
A parameter is a placeholder. When a function is called, we pass an argument to the function. This value is referred to as actual parameter. The parameter list refers to the type, order, and number of the parameters of a function. Parameters are optional depend on requirement.
first we need to use function signature at the top and implement function body wherever u want in program
Syntax of function is very simple

 int Add(); // signature
int main(){
   Add(); // calling function
}
int Add(){
   int x=5,y=5; 
retuen x+y;
}
Example

Function

  1. #include <iostream>  
  2. using namespace std;
  3. int myOwnMethod(); // function signature

  5. int main( ){
  6.  myOwnMethod(); // calling function
  7. return 0;
  8. }

  10. int myOwnMethod(){
  11. cout<<"This is my Own Function"<<endl;
  12. }
                                                Console :
                                                This is my Own Function
                                                Animated Gif of function or methods
                                                Watch Video
                                                C++ function or method for Beginners Lecture in Urdu Hindi
                                                Labels:

                                                Comments

                                                Post a Comment

                                                Popular posts from this blog

                                                C++ Classes and Objects Programming

                                                Animated Gif of class and object C++ class and Object A class is a blue print and combination of Different functions and variables. The  difference between C and C++  is that  C  is a procedural  programming  and does not support classes and objects, while  C++  provide support of Object Oriented Programming(OOP) and classes  therefore  C++  can be called a hybrid language. The variables and functions within a class are called members(variables,functions) of the class. Syntax of C++ Class A class definition starts with the keyword  class. For example, we defined the Student data type using the keyword  class  as follows. class Student { public:   string name; // member variables   int rollNumber; } A public member can be accessed from outside the class anywhere within the scope of the class object. You can also specify the members of a class as  private  o...
                                                5 comments
                                                Read more

                                                C++ Pass by Reference and Value Beginner Programming

                                                Animated Gif of Pass by Reference & Value C++ pass by Reference & value There is two way of accessing values of variables and passing values in function argument, first one is pass by value and second one is pass by reference . Reference variable is another name for a existing variable. Once a reference variable is initialized the reference name may be used to refer to the variable. A reference must be initialized when it is created.You can't have NULL references. You must always be able to assume that a reference is connected to a legitimate piece of storage.Once a reference is initialized to an object, it cannot be changed to refer to another object. & operator use to declare reference variable which is use to store variable value, you can access the value of the variable by using original variable name or by using the reference variable. Syntax of Reference  variable  is very simple //variable initialization int vari = 10; //sim...
                                                3 comments
                                                Read more

                                                C++ Member Initializer Beginner Programming

                                                C++ Member initializer Animated gif example  Member initializer C++ Member initializer for Beginners Lecture
                                                Post a Comment
                                                Read more