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/* Turns on and off the built-in-LED (light emitting diode)
when pressing a pushbutton attached to pin 8. */
/// constants won't change. They're used here to set pin numbers:
const int buttonPin = 8; // the number of the pushbutton pin
// variables will change:
int buttonState = 0; // variable for reading the pushbutton status
void setup() {
// initialize the pushbutton pin as an input:
pinMode(buttonPin, INPUT);
pinMode(LED_BUILTIN, OUTPUT); // Initialize the LED_BUILTIN pin as an output
}
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(LED_BUILTIN, HIGH);
} else {
// turn LED off:
digitalWrite(LED_BUILTIN, LOW);
}
}
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