byte tombol = 2;
byte status_tombol;
byte led = 3;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(tombol, INPUT);
  pinMode(led, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  status_tombol = digitalRead(tombol);
  Serial.println(status_tombol);
  if(status_tombol == 1)
    digitalWrite(led, HIGH); // Jika kondisi if terpenuhi maka LED akan menyala
  else
    digitalWrite(led, LOW); // JIka kondisi tidak terpenuhi maka LED akan mati
}