# bit.band

From ComputerCraft Wiki

Function bit.band | |

Computes the bitwise AND of two numbers | |

Syntax | bit.band(number m, number n) |

Returns | number the value of m AND n |

Part of | ComputerCraft |

API | bit |

## Examples

Example | |

AND the number 18 (10010) with the number 3 (00011), yielding 2 (00010) | |

Code |
print(bit.band(18, 3)) |

Output |
2 |

## Explanation

All bit operations operate in binary numeral system [1]. An AND operation between two bits yields a 1 if the bits are both 1 and a 0 if either of the bits is 0. This function produces an output by computing the AND of each bit of its two inputs independently. So, for the example above:

Bit index: | 4 | 3 | 2 | 1 | 0 |
---|---|---|---|---|---|

Input 1 (18): | 1 | 0 | 0 | 1 | 0 |

Input 2 (3): | 0 | 0 | 0 | 1 | 1 |

Calculation: | 3 has a 0 | Both 0 | Both 0 | Both 1 | 18 has a 0 |

Output (2): | 0 | 0 | 0 | 1 | 0 |