First C++ Program, Print Hello World in C++

C++ is a general purpose programming language. When you write a code for C++ remember to save it with .cpp file extension where .c file extension will work with C language. Now C++ is more flexible and efficient then C. In the first stage we will write a program about how to print something in C++ language. We will print simple “Hello World!” .Now let’s write the code and then we will know more about it

#include <iostream >

using namespace std;

int main()

{

    cout<<"Hallo World!";

    return 0;

}

Now let me describe this code. Here "#include" is called Processor Directive and " iostream " is a header file for C++. A Header file contain the description about functions it holds. Now Here “using namespace std;” is written for avoiding name space collision. It is done by localizing names of identifier. “std” is the name space.  

Here “main()” is the main function. Every program must hold not more than one main function. Execution of the program start from main function. The open close bracket with main function “()” is called parenthesis. Here “int main()” says that the main function is an integer type. An integer type function must return something, but in this program we are not going to return some value so we write “return 0” for that.

The open close bracket after main “{}” which will says that the body of main function is written inside this brackets.

Now inside the body we found that “cout < <”Hello World”;” where cout is a standard C++ function. This function is work for printing some outputs. If you want to use “cout” write it in this format – “cout<<”Your Text Here”;” then any this you write replacing “Your Text Here” will be printed.

Now we know the basic of C++, Let us print the output of above program.

Hello world!

So you successfully run your first stage of coding.