| x y | x := 2.0. [x > 0] whileTrue: [x := x / 2]. y := -2.0. [y < 0] whileTrue: [y := y / 2]. (x = 0.0) -> (x = y) -> ((x basicAt: 1) = (y basicAt: 1)) printIt returns true->true->false and: x = 0.0 and y = -0.0 the negative 0.0 https://en.wikipedia.org/wiki/Signed_zero <https://urldefense.proofpoint.com/v2/url?u=https-3A__en.wikipedia.org_wiki_S...>