ID Start - No

Unicode Version 18.0

No is a designation indicating that a character cannot begin an identifier in programming languages or text processing systems. This value applies to characters that are not letters, such as digits, punctuation marks, symbols, or control characters, which are excluded from starting a valid identifier. For example, the digit “3” or the hyphen “-” would receive a “No” value, meaning any attempt to use them as the first character of a variable, function name, or similar token would be invalid. This restriction ensures that identifiers follow consistent, predictable syntax rules, avoiding ambiguity with numeric literals or operators. The “No” value is thus a fundamental gatekeeper, defining the boundary between permissible and impermissible initial characters in lexical analysis.

1-250 of 151602 results

START OF HEADING

END OF TRANSMISSION

CHARACTER TABULATION

LINE TABULATION

CARRIAGE RETURN

LOCKING-SHIFT ONE

LOCKING-SHIFT ZERO

DATA LINK ESCAPE

DEVICE CONTROL ONE

DEVICE CONTROL TWO

DEVICE CONTROL THREE

DEVICE CONTROL FOUR

NEGATIVE ACKNOWLEDGE

SYNCHRONOUS IDLE

END OF TRANSMISSION BLOCK

GROUP SEPARATOR

INFORMATION SEPARATOR TWO

INFORMATION SEPARATOR ONE

Exclamation Mark

Left Parenthesis

Right Parenthesis

Greater-than Sign

Left Square Bracket

Reverse Solidus

Right Square Bracket

Circumflex Accent

Left Curly Bracket

Right Curly Bracket

Latin-1 Supplement

Latin-1 Supplement

BREAK PERMITTED HERE

START OF SELECTED AREA

END OF SELECTED AREA

CHARACTER TABULATION SET

CHARACTER TABULATION WITH JUSTIFICATION

LINE TABULATION SET

PARTIAL LINE DOWN

PARTIAL LINE BACKWARD

SINGLE SHIFT TWO

SINGLE SHIFT THREE

DEVICE CONTROL STRING

PRIVATE USE ONE

PRIVATE USE TWO

SET TRANSMIT STATE

CANCEL CHARACTER

MESSAGE WAITING

START OF GUARDED AREA

END OF GUARDED AREA

START OF STRING

Latin-1 Supplement

SINGLE CHARACTER INTRODUCER

CONTROL SEQUENCE INTRODUCER

STRING TERMINATOR

OPERATING SYSTEM COMMAND

PRIVACY MESSAGE

APPLICATION PROGRAM COMMAND

Inverted Exclamation Mark

Left-Pointing Double Angle Quotation Mark

Registered Sign

Plus-Minus Sign

Superscript Two

Superscript Three

Superscript One

Right-Pointing Double Angle Quotation Mark

Vulgar Fraction One Quarter

Vulgar Fraction One Half

Vulgar Fraction Three Quarters

Inverted Question Mark

Multiplication Sign

Modifier Letter Left Arrowhead

Modifier Letter Right Arrowhead

Modifier Letter Up Arrowhead

Modifier Letter down Arrowhead

Modifier Letter Centred Right Half Ring

Modifier Letter Centred Left Half Ring

Modifier Letter Up Tack

Modifier Letter down Tack

Modifier Letter Plus Sign

Modifier Letter Minus Sign

Double Acute Accent

Modifier Letter Rhotic Hook

Modifier Letter Cross Accent

Modifier Letter Extra-High Tone Bar

Modifier Letter High Tone Bar

Modifier Letter Mid Tone Bar

Modifier Letter Low Tone Bar

Modifier Letter Extra-Low Tone Bar

Modifier Letter Yin Departing Tone Mark

Modifier Letter Yang Departing Tone Mark

Modifier Letter Unaspirated

Modifier Letter Low down Arrowhead

Modifier Letter Low Up Arrowhead

Modifier Letter Low Left Arrowhead

Modifier Letter Low Right Arrowhead

Modifier Letter Low Ring

Modifier Letter Middle Grave Accent

Modifier Letter Middle Double Grave Accent

Modifier Letter Middle Double Acute Accent

Modifier Letter Low Tilde

Modifier Letter Raised Colon

Modifier Letter Begin High Tone

Modifier Letter End High Tone

Modifier Letter Begin Low Tone

Modifier Letter End Low Tone

Modifier Letter Shelf

Modifier Letter Open Shelf

Modifier Letter Low Left Arrow

Combining Grave Accent

Combining Acute Accent

Combining Circumflex Accent

Combining Tilde

Combining Macron

Combining Overline

Combining Breve

Combining Dot Above

Combining Diaeresis

Combining Hook Above

Combining Ring Above

Combining Double Acute Accent

Combining Caron

Combining Vertical Line Above

Combining Double Vertical Line Above

Combining Double Grave Accent

Combining Candrabindu

Combining Inverted Breve

Combining Turned Comma Above

Combining Comma Above

Combining Reversed Comma Above

Combining Comma Above Right

Combining Grave Accent Below

Combining Acute Accent Below

Combining Left Tack Below

Combining Right Tack Below

Combining Left Angle Above

Combining Left Half Ring Below

Combining Up Tack Below

Combining down Tack Below

Combining Plus Sign Below

Combining Minus Sign Below

Combining Palatalized Hook Below

Combining Retroflex Hook Below

Combining Dot Below

Combining Diaeresis Below

Combining Ring Below

Combining Comma Below

Combining Cedilla

Combining Ogonek

Combining Vertical Line Below

Combining Bridge Below

Combining Inverted Double Arch Below

Combining Caron Below

Combining Circumflex Accent Below

Combining Breve Below

Combining Inverted Breve Below

Combining Tilde Below

Combining Macron Below

Combining Low Line

Combining Double Low Line

Combining Tilde Overlay

Combining Short Stroke Overlay

Combining Long Stroke Overlay

Combining Short Solidus Overlay

Combining Long Solidus Overlay

Combining Right Half Ring Below

Combining Inverted Bridge Below

Combining Square Below

Combining Seagull Below

Combining X Above

Combining Vertical Tilde

Combining Double Overline

Combining Grave Tone Mark

Combining Acute Tone Mark

Combining Greek Perispomeni

Combining Greek Koronis

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