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# Or Operator

**Visual Studio .NET 2003**

Used to perform a logical disjunction on two **Boolean** expressions, or bitwise disjunction on two numeric values..

result = expression1 Or expression2

#### Parts

*result*- Required. Any
**Boolean**or numeric expression. For**Boolean**comparison the result is the logical disjunction of two expressions. For bitwise operations the result is a numeric value resulting from the bitwise disjunction of two numeric expressions. *expression1*- Required. Any
**Boolean**or numeric expression. *expression2*- Required. Any
**Boolean**or numeric expression of the same type as*expression1*.

#### Remarks

For **Boolean** comparison, if either *expression1* or *expression2* evaluates to **True**, *result* is **True. **If *expression1* evaluates to **True**, and *expression2* evaluates to **False** the *result* is **True**. The following table illustrates how *result* is determined:

If expression1 is | And expression2 is | Then result is |
---|---|---|

True | True | True |

True | False | True |

False | True | True |

False | False | False |

For bitwise operations, the **Or** operator performs a bitwise comparison of identically positioned bits in two numeric expressions and sets the corresponding bit in *result* according to the following table:

If bit in expression1 is | And bit in expression2 is | Then result is |
---|---|---|

0 | 0 | 0 |

0 | 1 | 1 |

1 | 0 | 1 |

1 | 1 | 1 |

NoteSince the logical/bitwise operators have a lower precedence than other arithmetic and relational operators, any bitwise operations should be enclosed in parentheses to ensure accurate execution.

If the operands consist of one **Boolean** expression and one numeric expression, the result **Boolean** expression will be converted to a numeric value (-1 for True, and 0 for False) and the bitwise operation will result.

#### Example

This example uses the **Or** operator to perform logical disjunction on two expressions. The result is a **Boolean** value that represents whether either of the two expressions is true.

Dim A As Integer = 10 Dim B As Integer = 8 Dim C As Integer = 6 Dim myCheck As Boolean myCheck = A > B Or B > C ' Returns True. myCheck = B > A Or B > C ' Returns True. myCheck = B > A Or C > B ' Returns False.

This example uses the **Or** operator to perform logical disjunction of the individual bits of two numeric expressions. The bit in the result pattern is set if either of the corresponding bits in the operands are set.

Dim A As Integer = 10 Dim B As Integer = 8 Dim C As Integer = 6 Dim myCheck As Integer myCheck = (A Or B) ' Returns 10. myCheck = (A Or C) ' Returns 14. myCheck = (B Or C) ' Returns 14.

#### See Also

Logical/Bitwise Operators | Operator Precedence in Visual Basic | Operators Listed by Functionality | OrElse Operator | Logical Operators