https://code-reference.com/ 2026-04-17T12:20:20+02:00 https://code-reference.com/ https://code-reference.com/ttps://code-reference.com/lib/tpl/dokuwiki/images/favicon.ico text/html 2024-02-16T01:04:28+02:00 https://code-reference.com/arduino/structure/loop?rev=1708041868&do=diff !loop() After creating a setup() function, which initializes and sets the initial values, the loop() function does precisely what its name suggests, and loops consecutively, allowing your program to change and respond. Use it to actively control the Arduino board. text/html 2024-02-16T01:04:28+02:00 https://code-reference.com/arduino/structure/setup?rev=1708041868&do=diff The setup() function is called when a sketch starts. Use it to initialize variables, pin modes, start using libraries, etc. The setup function will only run once, after each powerup or reset of the Arduino board. Example int buttonPin = 3; void setup() { Serial.begin(9600); pinMode(buttonPin, INPUT); } void loop() { // ... }