Unicode Character 'EMPTY SET' (U+2205)

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Unicode Data
Name EMPTY SET
Block Mathematical Operators
Category Symbol, Math [Sm]
Combine 0
BIDI Other Neutrals [ON]
Mirror N
Index entries set, null
null set
EMPTY SET
SET, EMPTY
Comments null set
used in linguistics to indicate a null morpheme or phonological "zero"
See Also latin capital letter o with stroke U+00D8
diameter sign U+2300
Version Unicode 1.1.0 (June, 1993)
Encodings
HTML Entity (decimal) ∅
HTML Entity (hex) ∅
HTML Entity (named) ∅
How to type in Microsoft Windows Alt +2205
UTF-8 (hex) 0xE2 0x88 0x85 (e28885)
UTF-8 (binary) 11100010:10001000:10000101
UTF-16 (hex) 0x2205 (2205)
UTF-16 (decimal) 8,709
UTF-32 (hex) 0x00002205 (2205)
UTF-32 (decimal) 8,709
C/C++/Java source code "\u2205"
Python source code u"\u2205"
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Java Data
string.toUpperCase()
string.toLowerCase()
Character.UnicodeBlock MATHEMATICAL_OPERATORS
Character.charCount() 1
Character.getDirectionality() DIRECTIONALITY_OTHER_NEUTRALS [13]
Character.getNumericValue() -1
Character.getType() 25
Character.isDefined() Yes
Character.isDigit() No
Character.isIdentifierIgnorable() No
Character.isISOControl() No
Character.isJavaIdentifierPart() No
Character.isJavaIdentifierStart() No
Character.isLetter() No
Character.isLetterOrDigit() No
Character.isLowerCase() No
Character.isMirrored() No
Character.isSpaceChar() No
Character.isSupplementaryCodePoint() No
Character.isTitleCase() No
Character.isUnicodeIdentifierPart() No
Character.isUnicodeIdentifierStart() No
Character.isUpperCase() No
Character.isValidCodePoint() Yes
Character.isWhitespace() No