How to read a SPST button with an Arduino

readSPSTButtonArduino.ino

#check out http://fritzing.org/projects/read-spst-arduino for wiring info

const int buttonPin = 5;
int buttonState = 0;

void setup() {
  Serial.begin(115200);

  //initialize button pin
  pinMode (buttonPin, INPUT_PULLUP);

  Serial.println("Device starting...");
}

void loop() {
   buttonState = digitalRead(buttonPin);
   Serial.println(buttonState);
}