// Chapter 3 - Buttons 
// Button with no resistor
// By Cornel Amariei for Packt Publishing

// Declare the pins for the Button and the LED
int buttonPin = 12;
int LED = 13;

void setup() {
  // Define pin #12 as input and activate the internal pull-up resistor
  pinMode(buttonPin, INPUT_PULLUP);
  // Define pin #13 as output, for the LED
  pinMode(LED, OUTPUT);
}

void loop(){
  // Read the value of the input. It can either be 1 or 0
  int buttonValue = digitalRead(buttonPin);
  
  if (buttonValue == LOW){
    // If button pushed, turn LED on   
    digitalWrite(LED, HIGH);  
  } else {
    // Otherwise, turn the LED off
    digitalWrite(LED, LOW);
  }
}