Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community!

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial


m k
m k
1,546 Points

Javascript Question on Function Quiz

In the following code, what value will printed to the console?

var animal = "cow";

function display (animal) {

animal = "pig"


can someone explain why the answer is horse? What is the difference between display and console.log

1 Answer

The only console.log statement is inside the function "display" so we need to trace the path back starting from there. we see that the last line is the only one that calls the function and more importantly, it passes in the parameter "horse". since "horse" is passed in from the function call as "animal", inside the function when we refer to animal we start from the nearest scope first which is the scope of the function, and thus "horse".