|| Operator
Description
Used to perform a logical disjunction on two expressions.
Syntax
result = expression1 || expression2The || 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
As for all logical operators, JScript will generate runtime errors for every case in the table below where an E is indicated:
obj as ns num bool undef null obj N E N N N E E as E E E E E E E ns N E N N N E E num N E N N N E E bool N E N N N E E undef E E E E E E E null E E E E E E E obj = Object, as = Alphanumeric String, ns = Numeric String, num = Number, bool = Boolean, undef = Undefined, null = Null value.
The following are the rules for converting non-boolean values to boolean:
- All objects are true.
- Strings are false if and only if they are empty.
- null and undefined are false.
- Numbers are false if and only if they are 0.