Hello World Program in C++
A "Hello, World!" is a simple program that outputs Hello, World! on the screen. Since it's a very simple program
- The program starts with the line #include<iostream> which is a preprocessor directive that tells the compiler to include the standard input/output library that provides functions to read from and write to the console.
- The line using namespace std; is a using declaration that allows us to use the standard namespace in our code. This means that we can use functions and objects from the standard library without having to prefix them with std::.
- The int main() function is the starting point of every C++ program. It returns an integer value to the operating system when the program terminates. In this case, it returns 0 which indicates that the program terminated successfully.
- The line cout<<"Hello World!"; uses the cout object from the standard library to write the message "Hello World!" to the console.
- Finally, the program ends with the return 0; statement which returns 0 to the operating system.
Source Code
#include<iostream>
using namespace std;
int main()
{
cout<<"Hello World!";
return 0;
}
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Output
Hello World