Code Explained -By E3 School

In this tutorial complete explain basic code in c++. So start the point code explained. Basic Syntax.

Question:

1. what is c++ code?
2. why use #include<iostream>?
3. why use "using namespace std"?
4. why use "int main"?
5. why use curly brackets "{  }"?
6. why use return value?
7. How to write a code in c++?

Explained Code

1. #include <iostream>
2. using namespace std;
3. int main() 
4. {
5. cout << "Hello World!";
6.   return 0;
7. }

#include<iostream>

#include<iostream> .It is the predefined library function used for input and output also called header files. iostream is the header file which contains all the functions of programs like cout, cin, etc. and #include tells the preprocessor to include these header file in the program.

Explained Code

1. #include <iostream>
2. using namespace std;
3. int main() 
4. {
5. cout << "Hello World!";
6.   return 0;
7. }

Using namespace std:

Using namespace std. This means that we can use names for objects and variables from the standard library.

Explained Code

1. #include <iostream>
2. using namespace std;
3. int main() 
4. {
5. cout << "Hello World!";
6.   return 0;
7. }

Int main():

Another thing that always appears in the C++ program, is int main(). This is called a function of any code inside its curly brackets.

Explained Code

1. #include <iostream>
2. using namespace std;
3. int main() 
4. {
5. cout << "Hello World!";
6.   return 0;
7. }

cout << "Hello World! ";.

cout << "Hello World! ";.The C++ cout statement is the instance of the iostream class. It is used to produce output on the standard output device which is usually the display screen.

Otherwise Defination: Cout Statement Output the result displays the screen. For Example: “Hello World” Show the message on screen.

Explained Code

1. #include <iostream>
2. using namespace std;
3. int main() 
4. {
5. cout << "Hello World!";
6.   return 0;
7. }

Return 0:

return 0; return 0 Ends the main Function.

Topic:

Bill Gate:

It's fine to celebrate success but it is more important to heed the lessons of failure.