// For the Arduino Discord channel.

int ledPin = 5;
int buttonPin = 4;

void setup() 
{
  Serial.begin(115200);
  Serial.println("--------------------------------");
  Serial.println("This is the Serial output.");
  Serial.println("Press the button to turn led on.");

  pinMode(ledPin, OUTPUT);
  pinMode(buttonPin, INPUT_PULLUP);
}

void loop() 
{
  // HIGH = 1 = true
  // LOW  = 0 = false
  // Therefor "!value" would be enough.

  int value = digitalRead(buttonPin);
  int led = (value == LOW) ? HIGH : LOW;
  digitalWrite(ledPin, led);

  delay(50);
}