Bit inversion
From HandWiki
Short description: Computing term meaning changing the state of a bit
In computing and telecommunications, bit inversion refers to the changing of the state of a bit or binary number to the opposite state, for example changing a 0 bit to 1 or vice versa.[1][2][3] It is often represented with a tilde (~).[4] It also refers to the changing of a state representing a given bit to the opposite state.
Usage in computing
Many popular programming languages implement bit inversion as an operation. For example, in JavaScript, bit inversion is known as a 'bitwise NOT' and is implemented as seen below:
var a = 2;
var b = ~ a;
In this example, a is a 32-bit signed integer and in binary would be 00000000000000000000000000000010. Variable b is the bit inversion of variable a and equals 11111111111111111111111111111101 (−3 in decimal).
In Python:
>>> a = 2
>>> b = ~ a
>>> b
-3
References
- ↑ "Bitwise NOT (~) - JavaScript | MDN" (in en-US). 2023-08-15. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Bitwise_NOT.
- ↑ "%BITNOT (Invert Bits)" (in en-us). 2023-04-11. https://www.ibm.com/docs/en/i/7.3?topic=functions-bitnot-invert-bits.
- ↑ "Invert actual bits of a number" (in en-US). 2018-05-18. https://www.geeksforgeeks.org/invert-actual-bits-number/.
- ↑ "~ - Arduino Reference". https://www.arduino.cc/reference/en/language/structure/bitwise-operators/bitwisenot/.
See also
- Bitwise operation
- Bit error
- Two's complement
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