JavaScript Parameter question

The "calling" of a function is done after you set the function. So in your above code, the function is set:

function random_age(age) {

  Math.floor(Math.random() * age);

}

and to call it, you do:

random_age("insert age here");

So the question is asking you merely to put in an age number where I wrote the "insert age here" because that is your parameter. If you create a function that requires a parameter, you cannot call it without giving it that parameter. In this case, it's an age. S

So one answer could look like this:

random_age(5);

Sun-Li Beatteay gave a very nice answer! However, I'm going to point out some semantic differences. Some programmers use the terms "argument" and "parameter" interchangeably. However, this is not entirely correct in the strictest sense. The parameter is in the declaration and definition of the function. The argument is what goes into the parameter when you call (invoke/execute) the function. Here's an example:

function addTwo (x, y) {
  return x + y;
}

var result = addTwo(5, 20);
console.log(result);

In this example, the function has two parameters x and y. And it accepts two arguments when we call the function. The arguments are 5 and 20. Try and think of it this way: a parameter is what the function accepts as information coming in. The arguments are the information sent to the function when we call it.

Hope this helps!