Switch - Case

switch () { 
   case "one": 
      console.log("first"); 
      break; 
   default: 
} 

switch (true) { 
   case (myNumber < 4): 
      something; 
      break; 
   case (myNumber > 4) && (myNumber < 10): 
      something; 
      break; 
   case (myNumber > 10) && (myNumber < 20): 
      something; 
      break; 
   default: 
}