U+00B1 Plus-Minus Sign
U+00B1 was added to Unicode in version 1.1 (1993). It belongs to the block
This character is a Math Symbol and is commonly used, that is, in no specific script. The character is also known as biquintile (astrological aspect: 144°).
The glyph is not a composition. It has a Ambiguous East Asian Width. In bidirectional context it acts as European Terminator and is not mirrored. In text U+00B1 behaves as Prefix Numeric regarding line breaks. It has type Other for sentence and Other for word breaks. The Grapheme Cluster Break is Any.
The CLDR project labels this character “plus-minus” for use in screen reading software. It assigns additional tags, e.g. for search in emoji pickers: plus-minus.
The Wikipedia has the following information about this codepoint:
The plus–minus sign, ±, is a mathematical symbol with multiple meanings.
- In mathematics, it generally indicates a choice of exactly two possible values, one of which is obtained through addition and the other through subtraction.
- In experimental sciences, the sign commonly indicates the confidence interval or uncertainty bounding a range of possible errors in a measurement, often the standard deviation or standard error. The sign may also represent an inclusive range of values that a reading might have.
- In medicine, it means "with or without".
- In engineering, the sign indicates the tolerance, which is the range of values that are considered to be acceptable, safe, or which comply with some standard or with a contract.
- In botany, it is used in morphological descriptions to notate "more or less".
- In chemistry, the sign is used to indicate a racemic mixture.
- In chess, the sign indicates a clear advantage for the white player; the complementary minus-or-plus sign, ∓, indicates the same advantage for the black player.
- In electronics, this sign may indicate a dual voltage power supply, such as ±5 volts means +5 volts and -5V volts, when used with audio circuits and operational amplifiers.
Representations
System | Representation |
---|---|
Nº | 177 |
UTF-8 | C2 B1 |
UTF-16 | 00 B1 |
UTF-32 | 00 00 00 B1 |
URL-Quoted | %C2%B1 |
HTML hex reference | ± |
Wrong windows-1252 Mojibake | ± |
HTML named entity | ± |
HTML named entity | ± |
HTML named entity | ± |
HTML named entity | ± |
alias | biquintile (astrological aspect: 144°) |
Encoding: EUC-KR (hex bytes) | A1 BE |
Encoding: ISO-8859-13 (hex bytes) | B1 |
Encoding: ISO-8859-15 (hex bytes) | B1 |
Encoding: ISO-8859-16 (hex bytes) | B1 |
Encoding: ISO-8859-7 (hex bytes) | B1 |
Encoding: ISO-8859-8 (hex bytes) | B1 |
Encoding: JIS0208 (hex bytes) | A1 DE |
Encoding: MACINTOSH (hex bytes) | B1 |
Encoding: WINDOWS-1250 (hex bytes) | B1 |
Encoding: WINDOWS-1251 (hex bytes) | B1 |
Encoding: WINDOWS-1252 (hex bytes) | B1 |
Encoding: WINDOWS-1253 (hex bytes) | B1 |
Encoding: WINDOWS-1254 (hex bytes) | B1 |
Encoding: WINDOWS-1255 (hex bytes) | B1 |
Encoding: WINDOWS-1256 (hex bytes) | B1 |
Encoding: WINDOWS-1257 (hex bytes) | B1 |
Encoding: WINDOWS-1258 (hex bytes) | B1 |
Encoding: X-MAC-CYRILLIC (hex bytes) | B1 |
LATEX | \pm |
AGL: Latin-1 | plusminus |
AGL: Latin-2 | plusminus |
AGL: Latin-3 | plusminus |
AGL: Latin-4 | plusminus |
AGL: Latin-5 | plusminus |
Adobe Glyph List | plusminus |
digraph | +- |
Elsewhere
Complete Record
Property | Value |
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1.1 (1993) | |
PLUS-MINUS SIGN | |
PLUS-OR-MINUS SIGN | |
Latin-1 Supplement | |
Math Symbol | |
Common | |
European Terminator | |
Not Reordered | |
None | |
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✘ | |
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✘ | |
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✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
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Any | |
✔ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
— | |
NA | |
Other | |
— | |
✘ | |
✘ | |
✔ | |
✘ | |
Yes | |
Yes | |
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Yes | |
Yes | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✔ | |
✘ | |
✘ | |
✘ | |
✘ | |
Other | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
Other | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
✘ | |
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None | |
Ambiguous | |
Not Applicable | |
— | |
No_Joining_Group | |
Non Joining | |
Prefix Numeric | |
None | |
not a number | |
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U |