Interfacing Magnetic Switch (Reed Switch) with Arduino

/*   
Reed Switch  
modified on 31 Aug 2020 
by Mohammad Reza Akbari @ Electropeak 
Home 
*/ 
int ledPin = 13; // LED connected to digital pin 13
int Sensor = 2;   // Reed Switch
int val = 0;     // variable to store the read value

void setup()
{
  pinMode(ledPin, OUTPUT);      // sets the digital pin 13 as output
  pinMode(Sensor, INPUT);      // sets the digital pin 7 as input
  Serial.begin(9600); // opens serial port, sets data rate to 9600 bps
}

void loop()
{
  val = digitalRead(Sensor);   // read the input pin
  
  if(val == LOW){
    Serial.print("I feel Magnetic field :)\n"); // print on serial port
    digitalWrite(ledPin, HIGH);
    delay(1000);
  }
  else{
    digitalWrite(ledPin, LOW);
  }
  
}