Arduino Serial Write with Pushbutton

gistfile1.ino

// Code for sensing a switch status and writing the value to the serial port.

byte switchPin = 2;                       // Switch connected to pin 2

void setup() {
  pinMode(switchPin, INPUT);      // Set pin 2 as an input
  Serial.begin(9600);                    // Start serial communication at 9600 bps
}

void loop() {
  if (digitalRead(switchPin) == HIGH) {  // If switch is ON,
    Serial.write(1);                     // send 1 to Serial (Processing)
  } else {                               // If the switch is not ON,
    Serial.write(0);                     // send 0 to Serial (Processing)
  }
  delay(100);                            // Wait 100 milliseconds
}