// 🛠 Fourth Arduino Program: Turn ON LED when Button is Pressed
// 👉 Concepts introduced: pinMode(INPUT), digitalRead(), button press detection

int ledPin = 13;    // LED connected to pin 13
int buttonPin = 7;  // Button connected to pin 7

void setup() {
  pinMode(ledPin, OUTPUT);  
  pinMode(buttonPin, INPUT);  // 1️⃣ Set button pin as INPUT
}

void loop() {
  int buttonState = digitalRead(buttonPin);  // 2️⃣ Read button state
  
  if (buttonState == HIGH) {  // 3️⃣ If button is pressed
    digitalWrite(ledPin, HIGH);
  } else {
    digitalWrite(ledPin, LOW);
  }
}