Arduino doesn’t natively support complex file system operations right out of the box.
Arduino typically interacts with microcontrollers that don’t have a traditional filesystem—so “files” aren’t managed the same way they are on a PC.
Expected output on the serial monitor will be the contents of example.txt if everything is wired and initialized correctly.
example.txt
Arduino doesn’t do command line arguments like traditional programming environments, because sketches are uploaded to microcontrollers without an accessible OS command line.
To write to a text file on an SD card using Arduino, you first need to include the SD.h library, which provides the necessary functions to interact with SD cards.
SD.h
Arduino doesn’t natively differentiate between standard output and standard error as conventional computing systems do.