Where we come from, a bunch of functions written in a programming ... not a problem with digitalWrite() per se, but it’s a warning when attempting tight timing using the Arduino defaults.) ...

digitalWrite() is a built-in Arduino function that simply ... Global variables can be accessed from anywhere in a program. Variables declared inside of functions are called local variables and ...

Until recently, Arduino microcontroller users needed to utilize the company's Arduino programming language ... can import to augment the range of functions available.