Not sure that this is the right place to ask. I use platformio 4.3.4 with the arduino framework. In various sketches that I looked at, it is implied that loop() is called within an endless loop so ...

2.1 Partes de un programa en Arduino (void setup / void loop). En Arduino encontramos dos partes de un programa, esto a modo de estructurar el programa. void setup(): Aquí se escribe el código que se ...