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Microsoft® JScript™
&& Operator
 Language Reference 
Version 1 

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Used to perform a logical conjunction on two expressions.
result = expression1 && expression2

The && operator syntax has these parts:

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

If, and only if, both expressions evaluate to True, result is True. If either expression evaluates to False, result is 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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