char input; // Declare the input variable to store the serial input

void setup() {
  pinMode(12, OUTPUT); // Set pin 12 as an output pin
  Serial.begin(9600); // Start serial communication at 9600 baud rate
  Serial.println("Arduino control of LED Using serial Monitor"); // Print a message to the serial monitor
}

void loop() {
  if (Serial.available()) { // Check if there is any data available to read
    input = Serial.read(); // Read the data and store it in the input variable
  }
  if (input == '1') { // If the input is '1'
    digitalWrite(12, HIGH); // Turn the LED on (pin 12 HIGH)
  }
  if (input == '0') { // If the input is '0'
    digitalWrite(12, LOW); // Turn the LED off (pin 12 LOW)
  }
}