void setup() {
  pinMode(LED_BUILTIN, OUTPUT); // Set the built-in LED as an output
  pinMode(2, INPUT_PULLUP);     // Set pin 2 as input with internal pull-up resistor
}

void ledon() {
  digitalWrite(LED_BUILTIN, HIGH); // Turn on the LED
}

void ledoff() {
  digitalWrite(LED_BUILTIN, LOW);  // Turn off the LED
}

void loop() {
  (digitalRead(2) == LOW) ? ledon() : ledoff(); // Ternary operator to decide LED state
}