const int buttonPin = 19; // Button pin
const int ledPin = 2;     // LED pin

void setup() {
  pinMode(buttonPin, INPUT_PULLUP); // Set the button pin as input with internal pull-up resistor
  pinMode(ledPin, OUTPUT);          // Set the LED pin as output
}

void loop() {
  // Read the state of the button (LOW when pressed, HIGH when not pressed due to INPUT_PULLUP)
  int buttonState = digitalRead(buttonPin);

  // If the button is pressed, turn on the LED, else turn it off
  if (buttonState == LOW) {
    digitalWrite(ledPin, HIGH); // Turn the LED on
  } else {
    digitalWrite(ledPin, LOW);  // Turn the LED off
  }
}