Hi, Am 12.10.2015 um 21:40 schrieb Mathias Röllig:
... What do you expect? For logical operations AND is equivalent to * and OR is equivalent to +.
no, that's not true. AND and OR have the same priority, just as * and / (division). (* and / have a higher priority than + and -.)
AND should have a higher priority than OR, so I would expect in both
Expressions have to be evaluated from left to right with respect to priority and parenthesis. "and" and "or" are binary operators. Therfore your examples can be written as "A or B" where "B = (C and D)". If you write your example as "A or (C and D)" then it is the same and everyone sees immediatly, how it is evaluated. In both cases, the result is TRUE, because "TRUE or anything" is TRUE, just as "TRUE or (anything)". "(A or B) and C" is totally different. On http://www.p-roocks.de/truthtable2.php you can create "tables of truth" (Wahrheitstabellen) for logical expressions like "A or B and C" and more complex ones.
cases (because TRUE Or (<anything>) = TRUE): bResult = TRUE But you will get TRUE Or FALSE And TRUE = (TRUE Or FALSE) And TRUE = TRUE TRUE Or TRUE And FALSE = (TRUE Or TRUE) And FALSE = FALSE Is there any explanation that AND and OR have (and should have) the same priority?
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