int ir_sensor_pin = 2; // IR sensor pin
void setup()
{
  Serial.begin(9600); // Serial monitor at baud rate 9600
  pinMode(ir_sensor_pin, INPUT); // Pin set as input
}

void loop() {
  if (digitalRead(ir_sensor_pin)) // if Pin logic is HIGH
  {
    Serial.println("Object detected"); // display on Serial monitor when object detected 
  }

  else {
   Serial.println("Object not detected"); // display on Serial when object not detected 
  }
}