The int here is the return type, indicating to the compiler that this function will return an integer value. As the name implies, this is our program's key function, and it is this function that starts the program's execution. This role is where code execution begins. The curly braces indicate where the role begins and ends.
The main() function is required in any valid C++ programme. For the time being, just note that #include iostream> is needed to use cout, which allows us to print output to the screen. This enables us to use cout to print output on the computer in our software. The contents of the iostream file are included in the above code. This file includes input/output functions that can be used in our software.The preprocessor directive #include is used to include files in our software. This statement instructs the compiler to include the iostream file in the output. They are typically the first programs that new coders learn and even those with little to no programming experience can quickly and correctly execute Hello World. Hello World programs are traditionally used to demonstrate how the coding process works as well as to ensure that a language or system is working properly. Without a proper compiler specification for your compiler, you would not be able to successfully parse a software system. The position of the framework include files, a list of predefined macros, and other options for the EDG parser specifying language features and compatibility levels are all contained in a compiler description.
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