// iterate over an array
var pageNames = [
  "Home",
  "About Us",
  "Contact Us",
  "JavaScript Playground",
  "News",
  "Blog",
];

for (var p in pageNames) {
  console.log(p, pageNames[p]);
}

for (var v of pageNames) {
  console.log(v);
}
 
// for...of uses an object-specific iterator and loops over the values generated by that, so it can also be used as follows on objects
 
let obj = { a: 1, b: 2, c: 3 };
 
for (let [key, value] of Object.entries(obj)) {
  console.log(`Key: ${key}, Value: ${value}`);
}
 
// and maps
let myMap = new Map([
  ["a", 1],
  ["b", 2],
  ["c", 3],
]);
 
// Using for...of to iterate over key-value pairs
for (let [key, value] of myMap) {
  console.log(`Key: ${key}, Value: ${value}`);
}

switch (expression) {
  case value1:
    // code to be executed if expression === value1
    break;
  case value2:
    // code to be executed if expression === value2
    break;
  default:
  // code to be executed if no case matches
}