// Program to count how many times a push button is pressed.
const int pushButton = 2;
int count = 0;

void setup() {
  Serial.begin(9600);
  pinMode(pushButton, OUTPUT);  // active HIGH input
}

void loop() {
  // wait for button press
  while (digitalRead(pushButton) == LOW) { // keep looping here as long as the button is NOT pressed
    delay(10);
  }

  // button has been pressed
  count++;
  Serial.println(count);
  
  // wait for button release
  while (digitalRead(pushButton) == HIGH) { // keep looping here as long as the button is pressed
    delay(10);
  }
}