Software-Project-II- First Assignent

#define PIN_LED 13 unsigned int count, toggle;

void setup() { pinMode(PIN_LED, OUTPUT);
Serial.begin(9600);

Serial.println("Hello World!"); count = 0; toggle = 0; digitalWrite(PIN_LED, toggle);
}

void loop() { Serial.println(++count);
toggle = toggle_state(toggle);
digitalWrite(PIN_LED, toggle);
delay(1000);
}

int toggle_state(int toggle) { return !toggle;
}