U+1D7F7 "𝟷" Mathematical Monospace Digit One Unicode Character

U+1D7F7 "𝟷" Mathematical Monospace Digit One is a numeral from the Mathematical Alphanumeric Symbols block, designed to mimic the appearance of a typewriter or computer monospace font digit one for use in mathematical and scientific notation where distinct, uniform character width is required. It belongs to a series of monospace digits that allow authors to specify a specific typographic style for numerals within complex formulas or code examples, helping to avoid ambiguity with similar looking characters like the standard digit "1" or the lowercase letter "l" in plain text. This character is typically rendered with a base that extends to a full character width, ensuring consistent alignment in monospaced environments.

General Properties

Code Point	U+1D7F7
Version Added	3.1
Name	Mathematical Monospace Digit One
Block	Mathematical Alphanumeric Symbols
General Category	Decimal Number
Canonical Combining Class	Not Reordered
Bidirectional Class	European Number
Decomposition Type	Font
Decomposition Mapping	"1" U+0031 Digit One

Encodings

HTML Decimal Encoding	𝟷
HTML Hex Encoding	𝟷
UTF-8 Encoding	0xF0 0x9D 0x9F 0xB7
UTF-16 Encoding	0xD835 0xDFF7
UTF-32 Encoding	0x0001D7F7
C/C++/Java Escape	\ud835\udff7

Unicode Properties

NFC Quick Check	Yes
NFD Quick Check	Yes
Numeric Type	Decimal
Numeric Value	1
Line Break	Numeric
Changes When NFKC Casefolded	Yes
NFKC Casefold	"1" U+0031 Digit One
NFKC Simple Casefold	"1" U+0031 Digit One
Script	Common
Script Extensions	Common
Indic Syllabic Category	Other
ID Continue	Yes
XID Continue	Yes
Math	Yes
Other Math	Yes
Vertical Orientation	Rotated
Grapheme Base	Yes
Grapheme Cluster Break	Other
Word Break	Numeric
Sentence Break	Numeric