Arduino Blink

As one types in their first line of code with: print(“Hello World!”), when starting to work with Arduino the first program will be blink, which involves one of its many components – LED.

void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(ledPin, OUTPUT);
}

void loop() {
  digitalWrite(ledPin, HIGH); \\turns LED on
  delay(1000);
  digitalWrite(ledPin, LOW); \\turns the LED off   
  delay(100);                      
}