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Logical OR Operator (||) 

Performs a logical disjunction on two expressions.


expression1 || expression2

expression1

Any expression.

expression2

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.

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