.. highlight:: cpp .. _lang-loop: loop() ====== After creating a :ref:`setup() <lang-setup>` function, which initializes your sketch, the ``loop()`` function gets called repeatedly, allowing your program to change and respond. Use it to actively control your Maple board. Example ------- :: int buttonPin = 38; // setup initializes serial and the button pin void setup() { SerialUSB.begin(); pinMode(buttonPin, INPUT); } // loop() checks the button pin each time it executes, // and will print 'H' if it is pressed, 'L' otherwise void loop() { if (digitalRead(buttonPin) == HIGH) { SerialUSB.println('H'); } else { SerialUSB.println('L'); } delay(1000); } See Also -------- - :ref:`setup() <lang-setup>` .. include:: /arduino-cc-attribution.txt