Let us look at a simple code that would print the words Hello World.
#include
using namespace std;
// main() is where program execution begins.
int main() {
cout << "Hello World"; // prints Hello World
return 0;
}
Let us look various parts of the above program:
The C++ language defines several headers, which contain information that is either necessary or useful to your program. For this program, the header is needed.
The line using namespace std; tells the compiler to use the std namespace. Namespaces are a relatively recent addition to C++.
The next line // main() is where program execution begins. is a single-line comment available in C++. Single-line comments begin with // and stop at the end of the line.
The line int main() is the main function where program execution begins.
The next line cout << "This is my first C++ program."; causes the message "This is my first C++ program" to be displayed on the screen.
The next line return 0; terminates main( )function and causes it to return the value 0 to the calling process.
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