js switch case

switch(expression) {
  case x:
    // code block
    break;
  case y:
    // code block
    break;
  default:
    // code block
}switch (a) {
    case 1:
        alert('case 1 executed');
        break;
    case 2:
        alert("case 2 executed");
        break;
   case 3:
        alert("case 3 executed");
        break;
    case 4:
        alert("case 4 executed");
        break;
    default:
        alert("default case executed");
}//javascript multiple case switch statement
var color = "yellow";
var darkOrLight="";
switch(color) {
    case "yellow":case "pink":case "orange":
        darkOrLight = "Light";
        break;
    case "blue":case "purple":case "brown":
        darkOrLight = "Dark";
        break;
    default:
        darkOrLight = "Unknown";
}

//darkOrLight="Light"let color = "black";

switch(color){
    case "red":
        console.log("color is red");
        break;
    case "white":
        console.log("color is white");
        break;
    case "black":
        console.log("color is black");
        break;
    default:
        console.log("unknow color");
}switch(expression) {
  case x:
    // code block
    break;
  case y:
    // code block
    break;
  default:
    // code block
}var Animal = 'Giraffe';
switch (Animal) {
  case 'Cow':
  case 'Giraffe':
  case 'Dog':
  case 'Pig':
    console.log('This animal will go on Noah\'s Ark.');
    break;
  case 'Dinosaur':
  default:
    console.log('This animal will not.');
}