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Clears one or more bits


n = bit.clear (a, b, ...)


This takes one or more arguments. All are converted to signed 'long long' (64-bit integers). The result is the first argument 'and'ed with the ones-complement of the other arguments.

In other words, you can clear any bits in the first argument which are set in subsequent arguments.


a = bit.clear (0x111, 0x01)  --> 0x110
a = bit.clear (0x111, 0x01, 0x10) --> 0x100

Note that setting a bit can be simply done with bit.bor.

Testing a bit can be done with bit.test.

See Also ...

Lua functions

bit.ashr - Shifts a number right, preserving sign
bit.band - Bitwise 'and'
bit.bor - Bitwise 'or'
bit.mod - Bitwise 'modulus' (remainder after integer divide)
bit.neg - Bitwise 'negate' (ones complement)
bit.shl - Shifts a number left
bit.shr - Shifts a number right
bit.test - Bitwise 'test'
bit.tonumber - Convert a string into a number
bit.tostring - Convert a number into a string
bit.xor - Bitwise 'exclusive or'


Lua base functions
Lua bc (big number) functions
Lua bit manipulation functions
Lua coroutine functions
Lua debug functions
Lua io functions
Lua LPEG library
Lua math functions
Lua os functions
Lua package functions
Lua PCRE regular expression functions
Lua script extensions
Lua string functions
Lua syntax
Lua table functions
Lua utilities
Scripting callbacks - plugins

(Help topic: lua=bit.clear)

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