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Logical OR Operator (||)

Performs a logical disjunction on two expressions.

expression1 || expression2


Any expression.
Any expression.


If either or both expressions evaluate to true, the result is true. The following table illustrates how the result is determined:

If expression1 coerces to And expression2 coerces to The result is The result coerces to
true true expression1 true
true false expression1 true
false true expression2 true
false false expression2 false

JScript uses the following rules for converting non-Boolean values to Boolean values:

  • All objects are considered true.
  • Strings are considered false if and only if they are empty.
  • null and undefined are considered false.
  • Numbers are false if, and only if, they are 0.


Version 1

See Also

Operator Precedence | Operator Summary