Ardunio IDE

Arduino Software (IDE) - contains a text editor for writing code.

WTF is a sketch

Files saved with thhhe extension .ino

setup() and loop()

There are two special functions that are a part of every Arduino sketch: setup() and loop(). The setup( you use setup ,which runs only onccccce to configure your app and loop to run it.

Resources

(https://thestempedia.com/tutorials/arduino-sketch-structure-flow/)