# Logical OR Operator (||) (JavaScript)

Performs a logical disjunction on two expressions.

result = expression1 || expression2

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 |

JavaScript 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.

Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards. See Version Information.