is the logical OR function. It evaluates its arguments in order, giving True immediately if any of them are True, and False if they are all False.


  • Or[e1,e2,] can be input in StandardForm and InputForm as . The character can be entered as Esc||Esc, EscorEsc, or \[Or].
  • Or has attribute HoldAll, and explicitly controls the evaluation of its arguments. In the are evaluated in order, stopping if any of them are found to be True.
  • Or gives symbolic results when necessary, removing initial arguments that are False.
Introduced in 1988
| Updated in 1996
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