char day = 'A';

int Led_Pin = 2;

void setup() {
  // put your setup code here, to run once:

  Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly:

  // Switch code structure.

  switch (day){
    case 1:
       // Code to be executed if expression equals case 1

       break;

    case 'A':
       // Code to be executed if expresson equals case 2

       digitalWrite(Led_Pin, HIGH);
       
       Serial.println("The bulb lights");

       delay(1000);

       digitalWrite(Led_Pin, LOW);

       Serial.println("Bulb does not light");

       delay(1000);

       break;
    case 3:
       // Code to be executed if expression equals case 3
       break;

    default:

       // Code to be executed if expression doesn't match any case
       break;
  }

}