The Arduino Course for Absolute Beginners is a great starting point that explains basic concepts like multi-line comments and variable initialization. Another excellent introductory resource is the Arduino for Beginners guide.
The Arduino website remains the primary source for the official Arduino IDE software, which you can use to write and upload code. Key Programming Features Covered in These Resources Download Programming with Arduino pdf
Most educational Arduino PDFs focus on these primary features: An Introduction To Arduino - GoTronic The Arduino Course for Absolute Beginners is a
For those interested in the underlying hardware and the C/C++ language specifics, the Microcontroller Programming with Arduino and Python manual from IIT Bombay covers board history and hardware organization. Download Programming with Arduino pdf