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Control character with value 0
The null character is a control character with the value zero. Many character sets include a code point for a null character – including Unicode (Universal
Null_character
Topics referred to by the same term
Look up Null, null, a-null, núll, or Nullus in Wiktionary, the free dictionary. Null may refer to: Nuller, an optical tool using interferometry to block
Null
Code point in a character set, that does not represent a written symbol
characters are still in use for anything resembling their original purpose: 0x00 (null, NUL, \0, ^@), originally intended to be an ignored character,
Control_character
Non-printing format effectors and control codes included in Unicode
example, the null character (U+0000 NULL) is used in C-programming application environments to indicate the end of a string of characters. In this way
Unicode_control_characters
Data structure
programming, a null-terminated string is a character string stored as an array containing the characters and terminated with a null character (a character with
Null-terminated_string
Topics referred to by the same term
up null or ␀ in Wiktionary, the free dictionary. Null symbol may refer to: Null character, U+0000 <control-0000> , Null sign (∅), the empty set Null (SQL)
Null_symbol
Topics referred to by the same term
a null train reporting number or headcode a suffix to a time indicating Coordinated Universal Time, rather than a local time zone the null character Midnight
0000
Special file in Unix-like operating systems
that provides as many null characters (ASCII NUL, 0x00) as are read from it. One of the typical uses is to provide a character stream for initializing
/dev/zero
Character used to start an escape sequence
\0 null character (U+0000 <control-0000> ) (only if the next character is not a decimal digit; else it is an octal escape sequence) \xFF character represented
Escape_character
In computing, a condition where an expression does not have a correct value
the next available input character, or EOF if there is no more available. (The ASCII character code defines a null character for this purpose, but the
Undefined_value
Character encoding standard
end-of-transmission character (EOT), also known as control-D, to indicate the end of a data stream. In the C programming language, and in Unix conventions, the null character
ASCII
Sequence of characters, data type
through a termination character, usually a character value with all bits zero such as in C programming language. See also "Null-terminated" below. String
String_(computer_science)
Signature pavilion at Expo 2025
null² (Japanese: ヌルヌル, pronounced Nurunuru) was a Signature Pavilion at the Expo 2025 Osaka, Kansai, Japan, held on Yumeshima Island in Osaka. It was produced
Null²
In-band data value that must be handled specially by computer code
common sentinel values and their uses: Null character for indicating the end of a null-terminated string. Null pointer for indicating the end of a linked
Sentinel_value
Communications protocol
line), followed by a blank line and then the body content, ending in a null character. Communication between server and client is through a MESSAGE, RECEIPT
Streaming Text Oriented Messaging Protocol
Streaming_Text_Oriented_Messaging_Protocol
Complete list of the characters available on most computers
with a null character (U+0000), or the correct encoding is actually UTF-32LE, in which the full 4-byte sequence FF FE 00 00 is one character, the BOM
Universal Character Set characters
Universal_Character_Set_characters
Delimited series of characters that represent a string in code
concatenation. Two string literals in a row are pasted together (with no null character in the middle) to make one combined string literal. This addition to
String_literal
Family of lossless-compression image file formats
for each chunk. The "key" must be between one and 79 characters long. Separator is a null character. The "value" can be any length, including zero up to
PNG
General-purpose programming language
first character of a null-terminated string specified as a string literal. The text \n is an escape sequence that denotes the newline character which
C_(programming_language)
Universal Character Set/Unicode code point, and a character entity reference refers to a character by a predefined name. A numeric character reference
List_of_Unicode_characters
Configuration file format
two function calls above. If the argument supplied for this parameter is NULL, the default is an empty string, "". Under Unix, many different configuration
INI_file
Manual codebreaking method
psi character is the null character ("·····" or 00000), /, then XOR-ing this with any other character does not change it. Thus the delta key character is
Turingery
Markup language and file format
encountered in day-to-day use. Character An XML document is a string of characters. Every legal Unicode character (except Null) may appear in an (1.1) XML
XML
Control parameter used in programming languages
one character longer than the specified input length. %c : Scan a character (char). No null character is added. whitespace: Any whitespace characters trigger
Scanf
action to be performed at all; they simply consume time. The ASCII "null" character is commonly used for this purpose. In actual practice with printers
Fill_character
Set of rules defining correctly structured programs for the C# programming language
extends C# with non-nullable types that checks so the variables of nullable types that has been set as non-nullable are not null. If is null then an exception
C_Sharp_syntax
Software security techniques
that the canaries are built of null terminators, CR, LF, and FF. As a result, the attacker must write a null character before writing the return address
Buffer_overflow_protection
Database for Microsoft Windows
containing NUL characters cannot be deleted with standard registry editors and require a special utility for deletion, such as RegDelNull. Different editions
Windows_Registry
Computer character not a allowed in a given context
marks, and null characters. "illegal character | Encyclopedia.com". www.encyclopedia.com. Retrieved 2023-09-07. "Python Escape Characters". www.w3schools
Illegal_character
Sending control flow information in the same channel as data
to signal the format or language of the following data. Embedding a NULL character as in C strings, to signal the end of the string (as opposed to keeping
In-band_signaling
Device file that discards all data written to it
the null device is a device file that discards all data written to it but reports that the write operation succeeded. This device is called /dev/null on
Null_device
Special character sequences in the C programming language
sequence \0 is a commonly used octal escape sequence, which denotes the null character, with value zero in ASCII and most encoding systems. It is still, however
Escape_sequences_in_C
Topics referred to by the same term
/dev/zero a special file in Unix-like operating systems that outputs null characters Symbols for zero #0 por Movistar Plus+, a former Spanish TV channel
0_(disambiguation)
ASCII-compatible variable-width encoding of Unicode
consequentially, the Character, String, and StringBuffer classes, but for I/O uses "Modified UTF-8", which is the same as CESU-8, except the null character U+0000 uses
UTF-8
Logical error that can often be found in programming
that the guaranteed null termination will not write beyond the maximum length. In reality, it will write a terminating null character one byte beyond the
Off-by-one_error
Aspect of WWII Allied intelligence gathering
contained a repeated character and the psi wheels did not move on, the differenced psi character (Δψ) would be the null character ('/' at Bletchley Park)
Cryptanalysis of the Lorenz cipher
Cryptanalysis_of_the_Lorenz_cipher
Computer security vulnerability to gain unauthorized access to the file system
extension. <?php include $_GET["file"] . ".html"; The user can use the NULL character (indicating the end of the string) in order to bypass everything after
Directory_traversal_attack
Finding strings that approximately match a pattern
generalized as forms of substitution by adding a null character (here symbolized by *) wherever a character has been deleted or inserted: insertion: co*t
Approximate_string_matching
Code intended as a payload to exploit a software vulnerability
the null character in common character sets. If the shellcode contained a null, the copy would be truncated and not function properly. To produce null-free
Shellcode
values that could be interpreted as delimiters or terminators (such as a null character). The format consists of the string's length written using ASCII digits
Netstring
C function to format and output text
length of the output buffer in bytes (including space for the trailing null character). asprintf provides for safety by accepting a string handle (char**)
Printf
Software development methodology
secure_programming(char *input) { char str[1000+1]; // One more for the null character. // ... // Copy input without exceeding the length of the destination
Defensive_programming
Text string used to uniquely identify a computer file
non-alphabetic scripts. Some file systems allow even unprintable characters, including Bell, Null, Return and Linefeed, to be part of a filename, although most
Filename
Suite of remote-access utilities
(not even a null character), meaning the connection is established. For example: Client: <null> bostic<null> kbostic<null> vt100/9600<null> Server: Both
Berkeley_r-commands
GNU replacement for the Bourne shell
characters, printable and non-printing, except for a few such as the null character and forward slash /, can be used in filenames. In addition, all strings
Bash_(Unix_shell)
Pioneering five-bit character encodings
of omitting some characters and adding more control codes. An explicit SPC (space) character was introduced, in place of the BLANK/NULL, and a new BEL code
Baudot_code
characters in the ASCII subset. Because they contain many zero bytes, character strings representing such files cannot be manipulated by common null-terminated
Comparison of Unicode encodings
Comparison_of_Unicode_encodings
Interface to device driver that appears in filesystem
continuous stream of null characters (zero-value bytes) as output when read from. /dev/full – produces a continuous stream of null characters (zero-value bytes)
Device_file
Simple form of encryption
classical cryptography, a null is an extra character intended to confuse the cryptanalyst. In the most common form of a null cipher, the plaintext is included
Null_cipher
Handling of strings in the C programming language
supported. For character strings, the standard library uses the convention that strings are null-terminated: a string of n characters is represented as
C_string_handling
Digital text encoding
mathematical symbols or Greek letters. All characters are printable except the null character. Calculator character sets "TI-83 Plus Large Font". TI-Basic
TI_calculator_character_sets
Character set
the string terminator character so CHR$(1) returns a null string. Code point 212, CHR$(212), translates to the printable " character. Because they are 50%
ZX80_character_set
Object-oriented programming language
except the indexed variables of strings, which are initialized to the null character or ByteArrays which are initialized to 0. A variable is assigned a value
Smalltalk
2024 video game
created the universe over the void to seal away Null, causing it to resent them. After Hyrule was founded, Null attempted to break its seal by creating rifts
The Legend of Zelda: Echoes of Wisdom
The_Legend_of_Zelda:_Echoes_of_Wisdom
Animated character in "The Site" television series
Dev Null was an animated virtual reality character created in 1996 by Leo Laporte for MSNBC's computer and technology TV series The Site. Espresso barista
Dev_Null
Non-printing characters used after control operations
commands. Typically the null character was used; the delete character was occasionally used. The number of padding characters depended on the particular
Output_padding
Set of rules defining correctly structured programs
working from left to right, or NULL if all the operands equal NULL. COALESCE(x1,x2) is equivalent to: CASE WHEN x1 IS NOT NULL THEN x1 ELSE x2 END The NULLIF
SQL_syntax
Unique string of length zero
the empty word or null string, is the unique string of length zero. Formally, a string is a finite, ordered sequence of characters such as letters, digits
Empty_string
Lossless image file format
data such as copyright and comments. The list is terminated with a NULL character. The next section contains the binary image data. The exact format is
Magick_Image_File_Format
Marker used in SQL databases to indicate a value does not exist
In the SQL database query language, null or NULL is a special marker used to indicate that a data value does not exist in the database. Introduced by the
Null_(SQL)
Concepts from statistical hypothesis testing
of a true null hypothesis in statistical hypothesis testing. A type II error, or a false negative, is the incorrect acceptance of a false null hypothesis
Type_I_and_type_II_errors
Microprocessor
it as it is, then writing the character into the dst string. Finally, it checks whether the character was a null character; if not, it repeats the loop
Motorola_68000
Computer fault caused by access to restricted memory
optimized away by dead code elimination: int* ptr = NULL; *ptr; The following code accesses the character array s beyond its upper boundary. Depending on
Segmentation_fault
Shell tool for executing jobs in parallel
-name "*.foo" -print0 | parallel -0 grep bar The above command uses the null character to delimit file names. find . -name "*.foo" | parallel -X mv {} /tmp/trash
GNU_parallel
American singer-songwriter musician (born 1965)
two albums, Ghosts I–IV and The Slip, independently on his own label, The Null Corporation. In 2009, Nine Inch Nails went on hiatus following the Wave Goodbye
Trent_Reznor
Unicode character block
both the uppercase and lowercase of the English alphabet and a control character. The Basic Latin block was included in its present form from version 1
Basic_Latin_(Unicode_block)
Topics referred to by the same term
code), airport in Nulato, Alaska The abbreviation for the null character in many character sets The NUL: device in DOS and related systems Agnes De Nul
NUL
Device for transmitting messages in written form by electrical signals
bits. It prints nothing because the characters received are all zeros, the ITA2 blank (or ASCII) null character. Teleprinter circuits were generally
Teleprinter
Standard UNIX utility
-0 rmdir When using the -print0 option, entries are separated by a null character instead of an end-of-line. This is equivalent to the more verbose command:find
Xargs
Dynamically loadable module that extends a running operating system kernel
to determine whether the module was GPLed stopped when it reached a null character (\0), so it was fooled into thinking that the module was declaring its
Loadable_kernel_module
Topics referred to by the same term
matched regular expression the logical defined-or operator in Perl, called the null coalescing operator in other programming languages the authority indicator
//
Purposely unassigned Unicode code points
substituted for UTF-16 codes which would contain null bytes, since LMBCS is designed to not contain embedded null bytes. IBM reserved several code page IDs for
Private_Use_Areas
Topics referred to by the same term
/dev/zero a special file in Unix-like operating systems that outputs null characters Zero client, a variant of the thin client computer type Zero of a function
Zero_(disambiguation)
Shell command for finding files
-print is performed. -print0 Prints the name of the found file plus a null character to the standard output. Not required by POSIX. -exec program [argument
Find_(Unix)
Foreign function interface for the Java language
not valid UTF-8 for all inputs, but a different encoding really. The null character (U+0000) and codepoints not on the Basic Multilingual Plane (greater
Java_Native_Interface
DC Comics supervillain
that no other living speedster has mastered. He can protect himself in a null-inertia force field, give speed and kinetic energy to objects or people,
Savitar_(character)
1948 science-fiction novel by A. E. van Vogt
The World of Null-A, sometimes written The World of Ā, is a 1948 science fiction novel by Canadian-American writer A. E. van Vogt. It was originally published
The_World_of_Null-A
Codes used for on-board diagnostics
five-character form like "U0158", where the first character (here 'U') represents the category the DTC belongs to, and the remaining four characters are
OBD-II_PIDs
Data storage device
found at one position on the six-level tape, that character could be turned into a null character to be skipped by punching out the remaining non-punched
Punched_tape
Character in Greek mythology
inserted is too short, then it is padded out, usually with spaces or null characters. If the string inserted is too long, it is truncated. The concept is
Procrustes
Procedural, imperative computer programming language
statements (SELECT/WHEN/OTHERWISE), loop controls (ITERATE and LEAVE) and null argument lists to disambiguate, e.g., DATE(). The PL/I optimizing compiler
PL/I
US television program
with a virtual reality cartoon character, Dev Null, was animated in real time on Silicon Graphics computers. The character was in fact ZDTV journalist Leo
The_Site
2011 edition of the C++ programming language standard
operator""_tuffix<'1', '2', '3', '4'>(). In this form, there is no null character terminating the string. The main purpose for doing this is to use C++11's
C++11
Absence in linguistics
In linguistics, a zero or null is a segment that is not pronounced or written. It is a useful concept in analysis, usually written with the symbol "∅"
Zero_(linguistics)
The following is a list of character summaries from the FX Networks television series The Shield. Michael Chiklis – Vic Mackey (2002–2008) Glenn Close
List_of_The_Shield_characters
Fictional character
since. The character's origin is based on a link between a human character and an android from another dimension known as Null Space. The character has also
Darkhawk
PRINT command to send a null character, because the newly assigned output device doesn't get initialised until the first character is sent to it—a common
Apple_II_graphics
Search tree data structure
alphabet used is simply that of the character encoding—resulting in, for example, a size of 128 in the case of ASCII. The null links within the children of a
Trie
Boolean operator
call operator, null-conditional operator, null-propagation operator) is a binary operator that returns null if its first argument is null; otherwise it
Safe_navigation_operator
IBM Selectric typewriter model
while copying from one tape station to the other. On a single tape one null character per line is reserved for insertions. A "switch code" instructs the playback
IBM_MT/ST
American entrepreneur
they could be tricked into accepting forged certificates by embedding null characters into the CN field. In 2011, Marlinspike presented a talk, "SSL And
Moxie_Marlinspike
NULL; Note NULL can be used for pointers and descriptors. Strings use descriptors extensively. Strings are of a defined length with no NULL character
Protel
Algorithm used in data compression
implementation notes from Manzini, it is equivalent to use a simple null character suffix instead. The sorting should be done in colexicographic order
Burrows–Wheeler_transform
Numerical coefficient in loop quantum gravity
number of degenerate states. One application could be if the classical null character of a horizon is disregarded in the quantum sector, in the lack of energy
Immirzi_parameter
American comic book from 2002 to 2003
most ruthless foe yet, Null—a formidable alien bounty hunter renowned for undertaking perilous missions that few would dare. Null wreaks havoc on Earth
Tech_Jacket
Standardised transport interface for the broadcast industry
standard for broadcasting) has a specific bit rate of 19.392658 Mbit/s. Null characters, represented by the ASCII comma, are used to pad the transmission to
Asynchronous_serial_interface
Adding data to a message prior to encryption to hide its length
strings (null-terminated string) as the null character can usually be stripped off as whitespace. Zero padding is sometimes also referred to as "null padding"
Padding_(cryptography)
Method of statistical inference
hypotheses: a default "null" hypothesis (denoted H0) and its negation, the "alternative" hypothesis (H1). Typically the test will select a null hypothesis that
Statistical_hypothesis_test
powers. She is inspired by the DC Comics villain Fiddler. Janet Petty / Null (portrayed by Bethany Brown) – A petty criminal who gained the ability to
List_of_The_Flash_characters
The following is a list of characters from the Showtime television series The Tudors (2007–2010). The main cast are listed in credits order. George Throckmorton
List_of_The_Tudors_characters
NULL CHARACTER
NULL CHARACTER
Surname or Lastname
Dutch and German
Dutch and German : from the personal name Nel, a reduced form of Cornelius.South German : nickname from Middle High German nelle ‘crown of the head’, perhaps denoting an obstinate person.English : from the Middle English personal name Nel(le), a variant of Neill.
Boy/Male
Shakespearean
Love's Labours Lost' A constable.
Male
Hungarian
Hungarian form of Greek Emmanouel, EMÃNUEL means "God is with us."
Girl/Female
Greek American English French
Shining light. The bright one.
Surname or Lastname
English
English : nickname for a strong, aggressive, bull-like man, from Middle English bul(l)e, bol(l)e. Occasionally, the name may denote a keeper of a bull. Compare Bulman.German (mainly northern) : from a byname for a cattle breeder, keeper, or dealer. Compare South German Ochs.South German : nickname for a short fat man, a variant of Bolle, or a nickname for a man with the physical characteristics of a bull.
Male
English
Medieval pet form of English Oliver, probably NOLL means "elf army."
Surname or Lastname
English
English : unexplained.Possibly a shortened form of any of several German compound surnames formed with Full- or Füll-.
Surname or Lastname
English
English : variant of Hill 1.English : from a pet form of Hugh.
Female
English
Pet form of English Eleanor, NELL means "foreign; the other."
Boy/Male
Hindu
Battle maiden
Girl/Female
American, Australian, British, Danish, English, French, German, Greek, Irish, Swedish
Shining Light; Light; The Light of the Sun from Eleanor and Variation of Helen; Sun Ray; Stone; Champion; Horn; Torch; Moon; Moon Elope
Surname or Lastname
English
English : from an Old English personal name, Lulla.German (Lüll) : from a short form of any of the Germanic personal names formed with liut- ‘people’ as the first element.Catalan (also Llull) : from the personal name Lullus, probably of Germanic origin.
Surname or Lastname
English
English : nickname from Middle English gulle ‘gull’ or gul(le) (Old Norse gulr) ‘yellow’, ‘pale’ (of hair or complexion).Swiss German : nickname for an irascible or unreliable person, from an Alemannic form of Latin gallus ‘rooster’. See also Guell.
Boy/Male
British, English, Spanish
Strong Leader; Empty
Girl/Female
Afghan, Australian, Danish, Swedish
God
Girl/Female
Arabic
Arabian Jasmine
Surname or Lastname
English
English : of uncertain origin, possibly from an unrecorded late survival of the Old English personal name Tula.South German (Tüll) : from a nickname for someone who was patient, from Middle High German dult ‘patience’; or from a personal name formed with the same word; or from Middle High German tult, dult ‘fair’, ‘festival’ (Bavarian Dult).South German : nickname for a stubborn man, Tull.Altered spelling of German Toll.
Boy/Male
Celtic
Champion.
Boy/Male
British, English
Grinder
Surname or Lastname
English
English : from the Old English personal name Cula.Americanized spelling of German and Swedish Kall or German Koll.
NULL CHARACTER
NULL CHARACTER
Girl/Female
Indian, Telugu
Perfect
Girl/Female
Hindu
Girl/Female
Tamil
Female
Japanese
(麻美) Japanese name ASAMI means "morning beauty."
Girl/Female
Muslim
Tune
Boy/Male
Hindu, Indian
Lord Narayana
Female
Spanish
Latin name derived from (dies) natalis, NATALIA means "birthday," or in Church Latin "Christmas day." In use by the Spanish.
Boy/Male
Arabic, Muslim
A Scholar of Baghdad who Wrote Books on the Quran and Related Subjects; Abu Al-hasan; Had this Name
Boy/Male
Muslim
Learned
Surname or Lastname
English
English : probably a habitational name from an unidentified place, possibly in the Newcastle area of northeastern England, where the surname is now most concentrated.Perhaps also an altered spelling of Swiss German Richle and Richli, from a short form of a Germanic personal name based on rīc, rīh ‘power(ful)’ (see Reich).
NULL CHARACTER
NULL CHARACTER
NULL CHARACTER
NULL CHARACTER
NULL CHARACTER
superl.
Furnishing little delight, spirit, or variety; uninteresting; tedious; cheerless; gloomy; melancholy; depressing; as, a dull story or sermon; a dull occupation or period; hence, cloudy; overcast; as, a dull day.
v. t.
To endeavor to raise the market price of; as, to bull railroad bonds; to bull stocks; to bull Lake Shore; to endeavor to raise prices in; as, to bull the market. See 1st Bull, n., 4.
Compar.
Abundantly furnished or provided; sufficient in. quantity, quality, or degree; copious; plenteous; ample; adequate; as, a full meal; a full supply; a full voice; a full compensation; a house full of furniture.
a.
No; not any; as, nul disseizin; nul tort.
v. t.
To dispirit or deaden; to dull or blunt.
v. t.
To move or operate by the motion of drawing towards one; as, to pull a bell; to pull an oar.
Compar.
Not wanting in any essential quality; complete, entire; perfect; adequate; as, a full narrative; a person of full age; a full stop; a full face; the full moon.
n.
A knob, handle, or lever, etc., by which anything is pulled; as, a drawer pull; a bell pull.
superl.
Not bright or clear to the eye; wanting in liveliness of color or luster; not vivid; obscure; dim; as, a dull fire or lamp; a dull red or yellow; a dull mirror.
v. t.
To strip off or separate the hull or hulls of; to free from integument; as, to hull corn.
n.
One who, or that which, resembles a bull in character or action.
n.
A contest; a struggle; as, a wrestling pull.
a.
Of or pertaining to a bull; resembling a bull; male; large; fierce.
n.
A promontory; as, the Mull of Cantyre.
n.
The act of rowing; as, a pull on the river.
a.
Quite full; choke-full.
n.
A cully; a dupe; a gull. See Cully.
v. i.
To become dull or stupid.
a.
Full to the brim; quite full; chock-full.
v. t.
To gather with the hand, or by drawing toward one; to pluck; as, to pull fruit; to pull flax; to pull a finch.