Configures the specified pin to behave either as an input or an output. See the description of digital pins for details.
pinMode(pin, mode)
pin: the number of the pin whose mode you wish to set mode: either INPUT or OUTPUT
None
int ledPin = 13; // LED connected to digital pin 13 void setup() { pinMode(ledPin, OUTPUT); // sets the digital pin as output } void loop() { digitalWrite(ledPin, HIGH); // sets the LED on delay(1000); // waits for a second digitalWrite(ledPin, LOW); // sets the LED off delay(1000); // waits for a second }
The analog input pins can be used as digital pins, referred to as A0, A1, etc.