# Community QBasic

Rebooting the QBasic we all know and love!

Project maintained by Cory Smith
# Boolean Operators

Boolean operators perform bit manipulations, Boolean operations, or tests on multiple relations. They return a true (nonzero) or false (zero) value to be used in making a decision.

## Syntax

*result* = *expression1* **boolean-operator** *expression2*

*boolean-operator* is any of the following:

NOT |
Bit-wise complement |

AND |
Conjunction |

OR |
Disjunction (inclusive ‘or’) |

XOR |
Exclusive ‘or’ |

EQV |
Equivalence |

IMP |
Implication |

Each operator returns results as indicated in the following truth table. *T* is true (nonzero) and *F* is false (zero).

*expression1* |
*expression2* |
NOT |
AND |
OR |
XOR |
EQV |
IMP |

T |
T |
F |
T |
T |
F |
T |
T |

T |
F |
F |
F |
T |
T |
F |
F |

F |
T |
T |
F |
T |
T |
F |
T |

F |
F |
T |
F |
F |
F |
T |
T |

Boolean operations are performed after arithmetic and relational operations in order of precedence.

Expressions are converted to integers or long integers before a Boolean operation is performed.

If the expressions evaluate to 0 or -1, a Boolean operation returns 0 or -1 as the result. Because Boolean operators do bit-wise calculations, using values other than 0 for false and -1 for true may produce unexpected results.