--description--

function favoriteAnimal(animal) {
  return animal + " is my favorite animal!"
}

console.log(favoriteAnimal('Goat'));

By putting animal inside the parentheses of the favoriteAnimal() function, you are telling JavaScript that you will send some value to your favoriteAnimal function. This means that animal is just a placeholder for some future value. But what value are you sending?

The last line, favoriteAnimal('Goat'), is where you are calling your favoriteAnimal function and passing the value 'Goat' inside that function. Here, 'Goat' is your argument. You are telling the favoriteAnimal function, "Please send 'Goat' to the favoriteAnimal function and use 'Goat' wherever the 'animal' placeholder is." Because of the flexibility that using a parameter provides, you can declare any animal to be your favorite.

Here is a diagram to help you visualize how parameters are passed to a function, and how values get returned from it.

Make note of the fact that by calling favoriteAnimal() inside of console.log() with the argument 'Goat', you get the return value of the function, string of "Goat is my favorite animal!", printed to the console. You're passing in a function call favoriteAnimal('Goat') as an argument in a different function call - log().

--questions--

--text--

If you change the argument from 'Goat' to 'Elephant' in the favoriteAnimal('Goat') function call, what would console.log(favoriteAnimal('Elephant')) print to the console?

--answers--

"Goat is my favorite animal!"

The function will return an error because "Elephant" is not a recognized argument.

"Elephant is my favorite animal!"

"Kangaroo is my favorite animal!"

--video-solution--

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