2. Arduino GPIO Programming Basics

Question.5

Sam needs to detect a switch on pin 7 of his Arduino Uno. If pressed, it should turn ON an LED on pin 13; if not, the LED stays OFF. Could you suggest the working code?

void setup() {
  pinMode(7, INPUT_PULLUP);
  pinMode(13, OUTPUT);
}

void loop() {
  if (digitalRead(7) == HIGH) {
    digitalWrite(13, HIGH);
  } else {
    digitalWrite(13, LOW);
  }
}

void setup() {
  pinMode(7, INPUT_PULLUP);
  pinMode(13, OUTPUT);
}

void loop() {
  if (digitalRead(7) == LOW) {
    digitalWrite(13, HIGH);
  } else {
    digitalWrite(13, LOW);
  }
}

void setup() {
  pinMode(7, INPUT);
  pinMode(13, OUTPUT);
}

void loop() {
  if (digitalRead(7) == LOW) {
    digitalWrite(13, HIGH);
  } else {
    digitalWrite(13, LOW);
  }
}

void setup() {
  pinMode(7, OUTPUT);
  pinMode(13, OUTPUT);
}

void loop() {
  if (digitalRead(7) == HIGH) {
    digitalWrite(13, HIGH);
  } else {
    digitalWrite(13, LOW);
  }
}