0x00. C - Hello, World || complete

File Descriptor 0 (STDIN_FILENO): This file descriptor represents standard input, which is the default input stream for a program. It is typically connected to the keyboard or the source from which the program is reading.

File Descriptor 1 (STDOUT_FILENO): This file descriptor represents standard output, which is the default output stream for a program. It is usually connected to the console or terminal and is where the program writes normal output.

File Descriptor 2 (STDERR_FILENO): This file descriptor represents standard error, which is used for error messages and exceptional conditions. It is also typically connected to the console or terminal, but separate from the standard output (stdout).