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Microsoft® JScript™
|| Operator
 Language Reference 
Version 1 

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Used to perform a logical disjunction on two expressions.
result = expression1 || expression2

The || operator syntax has these parts:

Part Description
result Any variable.
expression1 Any expression.
expression2 Any expression.

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

If expression1 is And expression2 is The result is
True True True
True False True
False True True
False False False

For information on when a run-time error is generated by the && operator, see the Operator Behavior table.

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

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