This is a guide about weird code. Not necessarily bad code, but weird.
It explains a few lesser-seen elements of C syntax. “The Arduino language” is really C++, which is basically C with added flavor crystals. C was developed back in the early 1970s and has become one of the most widely-used programming languages. With such a long and diverse history, you’re bound to find some odd creatures under the floorboards.
There are a couple of reasons this might be of interest:
To expand one’s own C (and C++, and thus Arduino) programming knowledge; maybe there’s valuable tips here to use.
To write code that’s friendlier to newcomers; maybe these are things to avoid. If it confused you, it may confuse others, and that’s not ideal for teaching!
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Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
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