Find the Symmetric Difference △ or ⊕?

JavaScript
1

Tell us what’s happening:
In this lesson I can see this expression:
C △ D = {1, 4} △ {2, 3} = {1, 2, 3, 4}
Is that correct?
Or the right expression is:
C ⊕ D = {1, 4} ⊕ {2, 3} = {1, 2, 3, 4}
Thank you.

Your code so far


function sym(args) {
  return args;
}

sym([1, 2, 3], [5, 2, 1, 4]);

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.100 Safari/537.36.

Link to the challenge:

2

Either one is fine to use