char letter = 'B'; 
 
switch(letter) { 
  case 'A': 
    Serial.println("Alpha");  // Does not execute 
    break; 
  case 'B': 
    Serial.println("Bravo");  // Prints "Bravo" 
    break; 
  default: 
    Serial.println("Zulu");   // Does not execute 
    break; 
}