In JavaScript, which value is not equal to itself, when we compare them??

Question

Value types

Answer 1

NaN is not equal to itself

console.log(NaN == NaN);
// false

console.log(NaN === NaN);
// false

console.log(NaN != NaN);
// true

Answer 2

Depends on definition of equality, right? :)

Answer 3

NaN is not equal to itself in most languages.

Answer 4

[0] == [0] returns false
[0] === [0] returns false
[0,0] == [0,0] returns false
[0,0] === [0,0] returns false
[0,x] == [0, x] (where x is seemingly any integer) returns false
[0,x] === [0, x] (where x is seemingly any integer) returns false

I hope this helped!