Ah, ok, a bit sad because all more scientific languages, and python too, all math books, all will use `-e^3` for meaning `-(e^3)` (^ or **), because it's just `-exp(3)` or `-pow(E, 3)`
and `(-1)^n` otherwise, when we want to take the signs with. If you wanted to avoid any confusion you could have forbidden `2**2**3` too because it's not obvious it's right associative But ok, thanks for the explanation. 2016-10-14 14:05 GMT+02:00 Bergi <[email protected]>: > Cyril Auburtin schrieb: > >> I would expect `-2**3` to return -8, or `-2**2 == -4`, since it should be >> like `-(2**3)` >> > > You would, others would not. -2 ** 2 clearly should return 4, shouldn't it? > > Is there a reason for this restriction? Python does it `-2**3` fine >> > > Because of the ambiguity it has been decided to make it a syntax error if > the two operators are used together. If you want `-(2**3)`, you have to > write it like that, and if you want `(-2)**3` you have to write it > explicitly as well. > See https://esdiscuss.org/topic/exponentiation-operator-precedence for > the full discussion. > > - Bergi > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss >
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