Which statement about the Number value NaN is true?
NaN == NaN is true but NaN === NaN is false
NaN === NaN is true and ordered comparisons are false
NaN is equal to itself but unequal to every other number
NaN is unequal to itself and ordered comparisons with it are false✓الإجابة الصحيحة
الشرح
NaN compares unequal to itself with both loose and strict equality, and ordered comparisons involving it are false. Therefore equality against NaN is not a reliable test; Number.isNaN or Object.is can identify the value directly.