expression1

Any expression.

expression2

Any expression.

If, and only if, both expressions evaluate to true, the result is true. If either expression evaluates to false, the result is false. The following table illustrates how the result is determined:

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.

Version 1

Concepts