Logical AND Operator (&&)

Microsoft Office JScript

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Microsoft® JScript® && Operator  Language Reference 
Version 1 

See Also

Description
Performs a logical conjunction 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, 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:

  • 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 zero.

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