bit.band

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Grid Redstone.png  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

Grid paper.png  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