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

#include <iostream>
using namespace std;
int myOwnMethod(); // function signature
int main( ){
myOwnMethod(); // calling function
return 0;
}
int myOwnMethod(){
cout<<"This is my Own Function"<<endl;
}

Console :

This is my Own Function

Animated Gif of function or methods

Watch Video

C++ function or method for Beginners Lecture in Urdu Hindi

Comments

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...

C++ Method or Function With Parameter Programming

Animated Gif of function or methods with parameter C++ function parameters A function is a set of different statements which is use to perform a specific task. If you want to pass any user value in function arguments then it must declare variables that accept the values of the arguments . These variables are known as parameters of the function. 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 . 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 p...

C++ Basic Syntax & how to Debug

C++ Basic Syntax and Debug In our previous post we create our first project and print out Hello world on console window without understanding of how this thing works.To understand how " Hello world" got printed we need to understand the Basic syntax of c++. #include <iostream> this line include header file of i nput o utput.it's mean we need to perform input output tasks and we need to tell compiler we want to use it. # means preprocessor directive these are well defined directives it's means it's already declared we just need to utilize it in our program. using namespace std; this line use to include the standard library support in our program int main() every project have one entry point when we run or debug a program it'll execute main() function. Return type of main() is int that's why we did return 0; at the end of the program. cout cout use to print output of our program on console << << is used to...

ITECH TALEEM

Search This Blog