Can you still?

What's the output?

function getAge() {
  'use strict';
  age = 21;
  console.log(age);
}

getAge();

You missed this one before

With "use strict", you can make sure that you don't accidentally declare global variables. We never declared the variable age, and since we use "use strict", it will throw a reference error. If we didn't use "use strict", it would have worked, since the property age would have gotten added to the global object.

Question 20 · see the original (opens in a new tab)