null - Does anybody know the rationale behind "(nil < 0) == true" and "(nil <= 0) == true" in Swift? -

i think swift constructed modern language, however, there 1 thing puzzle me, , rationale having (nil <= 0) == true , (nil < 0) == true.

here more cases:

anyway, return true nil < 0 seems go against whole optional concept, 1 of argument avoiding default number initialization "0". "0" special again.

anybody has explanation swift decided have (nil <= 0) , (nil < 0) return true.

optionals comparable, can sorted, example. rules simple:

1. any 2 optionals nil compare equal.
2. if 1 of optionals nil , other not, nil less non-nil.
3. if both optionals not nil, unwrapped values compared.

as consequence, nil equals nil, , nil less non-nil optional.

it has nothing value 0 assigned. assign -1000, or +100, or whatever like, , same result.