### What does **sign bit** mean?

# Definitions for sign bit

sign bit

#### This dictionary definitions page includes all the possible meanings, example usage and translations of the word **sign bit**.

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### Wiktionary

sign bitnoun

The bit in the representation of a number indicating whether it is negative or positive; applicable to both twos complement and signed magnitude representations.

### Wikipedia

Sign bit

In computer science, the sign bit is a bit in a signed number representation that indicates the sign of a number. Although only signed numeric data types have a sign bit, it is invariably located in the most significant bit position, so the term may be used interchangeably with "most significant bit" in some contexts. Almost always, if the sign bit is 0, the number is non-negative (positive or zero). If the sign bit is 1 then the number is negative, although formats other than two's complement integers allow a signed zero: distinct "positive zero" and "negative zero" representations, the latter of which does not correspond to the mathematical concept of a negative number. In the two's complement representation, the sign bit has the weight −2w−1 where w is the number of bits. In the ones' complement representation, the most negative value is 1 − 2w−1, but there are two representations of zero, one for each value of the sign bit. In a sign-and-magnitude representation of numbers, the value of the sign bit determines whether the numerical value is positive or negative.: 52–54 Floating-point numbers, such as IEEE format, IBM format, VAX format, and even the format used by the Zuse Z1 and Z3 use a sign-and-magnitude representation. When using a complement representation, to convert a signed number to a wider format the additional bits must be filled with copies of the sign bit in order to preserve its numerical value,: 61–62 a process called sign extension or sign propagation.

### ChatGPT

sign bit

The sign bit is a mechanism used in computer systems to represent the sign (positive or negative) of a numeric value, typically in binary form. It is typically the leftmost bit in a binary representation of a number, where 0 represents a positive value and 1 represents a negative value. The sign bit allows for the representation of both positive and negative numbers in a computer's numerical system.

### Wikidata

Sign bit

In computer science, the sign bit is a bit in a signed number representation that indicates the sign of a number. Only signed numeric data types have a sign bit, and its place is usually the leftmost, where the most significant bit in unsigned numbers resides. Floating point numbers in IEEE format are always signed, with the sign bit in the leftmost position. Typically if the sign bit is 1 then the number is negative or non-positive, while 0 indicates a non-negative number. In the two's complement representation, the sign bit has the weight −2−1 where w is the number of bits. In the ones' complement representation, the most negative value is 1 − 2−1, but there are two representations of zero, one for each value of the sign bit. In a sign-and-magnitude representation of numbers, the value of the sign bit determines whether the numerical value is positive or negative. When an 8-bit value is added to a 16-bit value using signed arithmetic, the processor unit propagates the sign bit through the high order half of the 16-bit register holding the 8-bit value – a process called sign extension or sign propagation. The process of sign extension is used whenever a smaller signed data type needs to be converted into a larger signed data type while still retaining its original numerical value.

### Anagrams for sign bit »

bitings

### Numerology

Chaldean Numerology

The numerical value of sign bit in Chaldean Numerology is:

**1**Pythagorean Numerology

The numerical value of sign bit in Pythagorean Numerology is:

**8**

## Translations for **sign bit**

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