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- const int buttonPin = 2; // the number of the pushbutton pin
- const int ledPin = 13; // the number of the LED pin
- // variables will change:
- int buttonState = 0;
- void setup() {
- // initialize the LED pin as an output:
- pinMode(ledPin, OUTPUT);
- // initialize the pushbutton pin as an input:
- pinMode(buttonPin, INPUT);
- }
- void loop() {
- // read the state of the pushbutton value:
- buttonState = digitalRead(buttonPin);
- // check if the pushbutton is pressed.
- // if it is, the buttonState is HIGH:
- if (buttonState == HIGH) {
- // turn LED on:
- digitalWrite(ledPin, HIGH);
- } else {
- // turn LED off:
- digitalWrite(ledPin, LOW);
- }
- }
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