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Microsoft® JScript
|| Operator

See Also

 | Language Reference |
Description
Used to perform a logical disjunction on two expressions.

Syntax
result = expression1 || expression2

The || operator syntax has these parts:

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

Remarks

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, please see the Logical Operators table.

The following are the 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.

© 1996 by Microsoft Corporation.

See also:

file: /Techref/language/asp/js/176.htm, 3KB, , updated: 1996/11/22 10:11, local time: 2012/2/10 07:04,
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