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Search references for NULL SYMBOL. Phrases containing NULL SYMBOL
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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
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
Marker used in SQL databases to indicate a value does not exist
lowercase Greek omega (ω) symbol to represent null in database theory. In SQL, NULL is a reserved word used to identify this marker. A null should not be confused
Null_(SQL)
Sign representing zero or empty set
The null sign (∅) is a symbol often used in mathematics for denoting the empty set. The same letter in linguistics represents zero, the lack of an element
Null_sign
Unique string of length zero
production rule that allows a symbol to produce the empty string is known as an ε-production, and the symbol is said to be "nullable". In most programming languages
Empty_string
Linguistics concept
When representing empty categories in tree structures, linguists use a null symbol (∅) to depict the idea that there is a mental category at the level being
Empty_category
Topics referred to by the same term
ship Standard state, in chemistry ⍉ ⊖ ⌽ Circle symbol (disambiguation) Null (disambiguation) Null symbol (disambiguation) Barred O (disambiguation) 0 (disambiguation)
Ø_(disambiguation)
Control character with value 0
character for this: U+2400 ␀ SYMBOL FOR NULL. In caret notation the null character is ^@. On some keyboards, one can enter a null character by holding down
Null_character
Object with no referenced value or with defined neutral ("null") behavior
computer programming, a null object is an object with no referenced value or with defined neutral (null) behavior. The null object design pattern, which
Null_object_pattern
Morpheme with no phonetic form
either the figure zero (0) or the empty set symbol ∅. In most languages, it is the affixes that are realized as null morphemes, indicating that the derived
Null_morpheme
A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation
Glossary of mathematical symbols
Glossary_of_mathematical_symbols
Position that there is no relationship between two phenomena
The statement that is being tested against the null hypothesis is the alternative hypothesis. Symbols may include H 1 {\displaystyle H_{1}} and H A {\displaystyle
Null_hypothesis
Number
proper rendering support, you may see question marks, boxes, or other symbols. 0 (zero, /ˈziː.roʊ/) is a number representing an empty quantity. Adding
0
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
schema-less) binary compression standard for XML. All basic Ion types have a null variant, as its 0xXf tag. Any tag beginning with 0x0X other than 0x0f defines
Comparison of data-serialization formats
Comparison_of_data-serialization_formats
LISP computer programming language variant
definition: when evaluated with no arguments, the princ function returns a null symbol, which is not displayed by the AutoCAD command-line interface. As the
AutoLISP
Currency sign
resembles a capital letter Y with a single or double horizontal stroke. The symbol is usually placed before the value it represents, for example: ¥50, or JP¥50
Yen_and_yuan_sign
Musical algorithm for encrypting and decrypting information
requires some visual marker that distinguishes them from the meaningless null-symbol notes (e.g., the cipher melody is only in the tenor line or only the
Music_cipher
Absence in linguistics
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 "∅", indicating
Zero_(linguistics)
Notation used for Chinese phonetics
[two arrows facing each other vertically]; ≺ for inhalation and the null symbol ⟨∅⟩. As of 2026[update], the non-coronal affricate ligatures, the ι-ɕ
Sinological_phonetic_notation
Infinite cardinal number
ℵ 0 {\displaystyle \aleph _{0}} (read aleph-nought, aleph-zero, or aleph-null); the next larger cardinality of a well-ordered set is ℵ 1 , {\displaystyle
Aleph_number
1948 science-fiction novel by A. E. van Vogt
Books paperback editions were entitled The World of Null-A, and the symbol Ā was replaced with "null-A" throughout the text. The 1970 revision kept this
The_World_of_Null-A
Letter in several Latin-script alphabets
the open-mid back unrounded vowel [ʌ]. Ø (or more properly, the similar null sign, ∅), is used in English as a short for "no" or "none", but this usage
Ø
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
Mathematical representation of absence of a value
In mathematics, the word null (from German: null[citation needed] meaning "zero", which is from Latin: nullus meaning "none") is often associated with
Null_(mathematics)
Function of the observed sample results
In null-hypothesis significance testing, the p-value is the probability of obtaining test results at least as extreme as the result actually observed,
P-value
Study of the biology and evolution of language
as being filled by a null symbol (∅) as this past tense form does not have any phonological content. Although covert, this null tense marker is an important
Biolinguistics
A nullor is a theoretical two-port network consisting of a nullator at its input and a norator at its output. Nullors represent an ideal amplifier, having
Nullor
Siouan language of US Midwest
The letter V stands in the place of the verb stem.: In this table, the null symbol (∅) is used to represent all third person singular actor and patient
Ho-Chunk_language
Binary operator in computer programming
symbol, given that ?: is typically used for the Elvis operator, not null coalescing, but it was inspired by Groovy (programming language) where null is
Null_coalescing_operator
Twenty-first letter in the Greek alphabet
section; for example, "⌀14" means the diameter of the circle is 14 units. The null sign, ∅, which denotes the empty set in mathematics is sometimes also erroneously
Phi
Typographic character indicating a question (?)
optional parameter. In Scheme, as a convention, symbol names ending in ? are used for predicates, such as odd?, null?, and eq?. Similarly, in Ruby, method names
Question_mark
unique to Ion: { symbol: 'a symbol', // symbols are interned Unicode strings "A null integer": null.int, annotated: age::35, // the symbol "age" is attached
Ion_(serialization_format)
Sequence of characters, data type
character value with all bits zero such as in C programming language. See also "Null-terminated" below. String datatypes have historically allocated one byte
String_(computer_science)
Last letter of the Greek alphabet
dominant nature of functions In relational database theory to represent NULL, a missing or inapplicable value In APL, to represent the right parameter
Omega
Grammar formalism
M. (1972), "String Adjunct Grammars: II. Equational Representation, Null Symbols, and Linguistic Relevance", Information and Control, 21 (3): 235–260
Tree-adjoining_grammar
Rule system for formal languages
terminal symbols from the start symbol. X {\displaystyle X} is called useless if it is unreachable or unproductive. X {\displaystyle X} is called nullable if
Context-free_grammar
Type that allows only one value
written as (). In Common Lisp the type named NULL is a unit type which has one value, namely the symbol NIL. This should not be confused with the NIL
Unit_type
Punctuation and accent mark (~, ◌̃)
set of aliases that processors are recommended to use, resolves a tilde as null. The presence (or absence) of a tilde engraved on the keyboard depends on
Tilde
First letter of the Greek alphabet
underneath a normal curve in statistics to denote significance level when proving null and alternative hypotheses. It is also commonly used in algebraic solutions
Alpha
Code section for declared statically-allocated variables
In computer programming, the block starting symbol (abbreviated to .bss or bss) is the portion of an object file, executable, or assembly language code
.bss
System of phonetic notation
contains phonetic symbols. Without proper rendering support, you may see question marks, boxes, or other symbols instead of phonetic symbols. The International
International Phonetic Alphabet
International_Phonetic_Alphabet
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
//
Topics referred to by the same term
U+2047 ⁇ DOUBLE QUESTION MARK, may refer to: A symbol indicating a blunder in chess annotation symbols The null coalescing operator, in some programming languages
??
Continuous deformation between two continuous functions
called a null-homotopy.) For example, a map f {\displaystyle f} from the unit circle S 1 {\displaystyle S^{1}} to any space X {\displaystyle X} is null-homotopic
Homotopy
Blossom of a cherry tree
blossom". www.diffordsguide.com. Retrieved 6 June 2023. Poonam, V.; Raunak, null; Kumar, G.; Reddy L, C. S.; Jain, R.; Sharma, S. K.; Prasad, A. K.; Parmar
Cherry_blossom
SQL clause
above tables: CREATE TABLE department( DepartmentID INT PRIMARY KEY NOT NULL, DepartmentName VARCHAR(20) ); CREATE TABLE employee ( LastName VARCHAR(20)
Join_(SQL)
Letter that is not pronounced
letter is often symbolised with a null sign U+2205 ∅ EMPTY SET, which resembles the Scandinavian letter Ø. A null or zero is an unpronounced or unwritten
Silent_letter
Set of rules defining correctly structured programs
rendering support, you may see question marks, boxes, or other symbols instead of APL symbols. The programming language APL is distinctive in being symbolic
APL_syntax_and_symbols
Pioneering five-bit character encodings
of the first code will not give a digit or another symbol from the figures page (because the Null code can be arbitrarily inserted near the end or beginning
Baudot_code
Data having only values "true" or "false"
condition-testing statements (if, while) assume that zero (and hence a NULL pointer or a null string terminator '\0' also) is false and all other values are true
Boolean_data_type
Punctuation mark (!)
language, "!!" ("double-bang") is the not-null assertion operator, used to override null safety so as to allow a null pointer exception. In the ML programming
Exclamation_mark
Magical symbol
A sigil (/ˈsɪdʒɪl/) is a type of symbol used in magic. The term usually refers to a pictorial signature of a spirit (such as an angel, demon, or deity)
Sigil
Topics referred to by the same term
modelling Higgs boson, in physics, symbol H0 Hammett acidity function, in chemistry, H0 Hubble constant, in cosmology, H0 Null hypothesis, in statistics, often
H0
Unit of organization for a sequence of speech sounds
International Phonetic Alphabet (IPA). For an introductory guide on IPA symbols, see Help:IPA. For the distinction between [ ], / / and ⟨ ⟩, see IPA § Brackets
Syllable
Belief system
year in the origin of chaos magic, seeing the publication of both Liber Null by Carroll and The Book of Results by Sherwin – the first published books
Chaos_magic
which the comma is 0. This allows NULL values (when the code and comma is a single 0, the value can be taken as a NULL or a 0). Fibonacci coding, in which
Comma_code
Mathematical set containing no elements
textbooks and popularizations, the empty set is referred to as the "null set". However, null set is a distinct notion within the context of measure theory,
Empty_set
Universal subtype in logic and computer science
named NIL is sometimes confused with the type named NULL, which has one value, namely the symbol NIL itself. In Scala, the bottom type is denoted as Nothing
Bottom_type
Broadest definition of sizes in integer-dimensional spaces
sets of measure zero, and all sets that differ from a Borel set by such a null set. Equivalently, a set E ⊆ R n {\displaystyle E\subseteq \mathbb {R} ^{n}}
Lebesgue_measure
Technique to compress data
by Shannon (1948), the information content h (in bits) of each symbol ai with non-null probability is h ( a i ) = log 2 1 w i . {\displaystyle h(a_{i})=\log
Huffman_coding
Indian election
warranto must issue". In effect, her appointment as Chief Minister was declared null and invalid with retrospective effect. Therefore, technically, she was not
2001 Tamil Nadu Legislative Assembly election
2001_Tamil_Nadu_Legislative_Assembly_election
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 Symbols for zero #0 por Movistar Plus+, a former Spanish TV channel O,
0_(disambiguation)
Unicode character block
you may see question marks, boxes, or other symbols instead of the intended characters. Musical Symbols is a Unicode block containing characters for
Musical Symbols (Unicode block)
Musical_Symbols_(Unicode_block)
Self-balancing binary search tree data structure
(non-NULL) black node (of black height ≥ 1), symbolises the color red or black of a non-NULL node, but the same color throughout the same diagram. NULL nodes
Red–black_tree
Generalization of straight line to a curved space time
μ α β {\displaystyle \Gamma ^{\mu }{}_{\alpha \beta }} are Christoffel symbols (sometimes called the affine connection coefficients or Levi-Civita connection
Geodesics in general relativity
Geodesics_in_general_relativity
File format for debugging information
of all symbols in a module with their addresses and possibly the name of the file and the line on which the symbol was declared. This symbol information
Program_database
Statistical hypothesis test
p} -value by comparing T {\displaystyle T} to its distribution under the null hypothesis. The ranks are defined so that R i {\displaystyle R_{i}} is the
Wilcoxon_signed-rank_test
digit 6. In certain contexts, zero and nothing are interchangeable, as is "null". Sporting terms are sometimes used as slang terms for zero, as are "nada"
Names for the number 0 in English
Names_for_the_number_0_in_English
Warning plate system used in some countries
or name. There is also a standard null Hazchem plate to indicate the transport of non-hazardous substances. The null plate does not include an EAC or substance
Hazchem
Value to which tends an infinite sequence
sequence "tend to", and is often denoted using the lim {\displaystyle \lim } symbol (e.g., lim n → ∞ a n {\displaystyle \lim _{n\to \infty }a_{n}} ). If such
Limit_of_a_sequence
Flat-sided three-dimensional shape
perspective drawing, and were depicted in marquetry panels of the period as a symbol of geometry. Piero della Francesca wrote about constructing perspective
Polyhedron
proper rendering support, you may see question marks, boxes, or other symbols. As of Unicode version 17.0, there are 297,334 assigned characters with
List_of_Unicode_characters
Statistic used in statistical hypothesis testing
group. The null hypothesis is that two variances are the same – so the proposed grouping is not meaningful. In the table below, the symbols used are defined
Test_statistic
International Phonetic Alphabet (IPA). For an introductory guide on IPA symbols, see Help:IPA. For the distinction between [ ], / / and ⟨ ⟩, see IPA § Brackets
Obsolete and nonstandard IPA symbols
Obsolete_and_nonstandard_IPA_symbols
Typographical mark (`) (Freestanding grave accent)
produce the ` character itself. For example, the nullable boolean of .NET is specified in PowerShell as [Nullable``1[System.Boolean]]. Python: Prior to version
Backtick
Notation for context-free formal grammars
and C are nonterminal symbols, the letter a is a terminal symbol (a symbol that represents a constant value), S is the start symbol, and ε denotes the empty
Chomsky_normal_form
Mathematical description of spacetime used in relativity
null vectors, called a null basis. Vector fields are called timelike, spacelike, or null if the associated vectors are timelike, spacelike, or null at
Minkowski_spacetime
Concept in relational databases
data values (such as numbers, letters or typographic symbols) but not data marks (also known as NULL marks in SQL world). Morphologically, a composite primary
Entity_integrity
Human blood group system involving 49 blood antigens
Hasekura H, Boettcher B (1970). "Family study of the original Australian Rh-null". Proceedings of the Japan Academy. 46 (7): 733–737 – via J-STAGE. Bailey
Rh_blood_group_system
Zero-forcing (or null-steering) precoding is a method of spatial signal processing by which a multiple antenna transmitter can null the multiuser interference
Zero-forcing_precoding
Claims of perceiving information by a 6th sense, the mind
Press. pp. 216–231. ISBN 978-0521608343 Alcock, James. (2003). Give the Null Hypothesis a Chance: Reasons to Remain Doubtful about the Existence of Psi
Extrasensory_perception
Matrix whose entries are all 0
In mathematics, particularly linear algebra, a zero matrix or null matrix is a matrix all of whose entries are zero. It also serves as the additive identity
Zero_matrix
Typographical symbol
proper rendering support, you may see question marks, boxes, or other symbols. An interpunct ·, also known as an interpoint, middle dot, raised dot,
Middle_dot
Mathematical model combining space and time
moving at the speed of light is zero. Such an interval is termed lightlike or null. A photon arriving in our eye from a distant star will not have aged, despite
Spacetime
Fictional character in the novel ''Catch-22''
Literature Alan Nadel observes that Maj. Major is "perhaps the exemplary null set in the novel". Everything about the character, he states, signifies nothing:
Major_Major_Major_Major
Character encoding standard
programming language, and in Unix conventions, the null character is used to terminate text strings; such null-terminated strings can be known in abbreviation
ASCII
Form of source code, without regard to meaning
semantically defined (because p is a null pointer, the operations p->real and p->im have no meaning): complex *p = NULL; complex abs_p = sqrt (p->real * p->real
Syntax (programming languages)
Syntax_(programming_languages)
Data structure with nodes pointing to the next node
temp->next = NULL; // initialize invalid links to nil. if (!head) { head = temp; // If the linked list is empty (i.e., the head node pointer is a null pointer)
Linked_list
Character used to start an escape sequence
If cross-browser compatibility is a concern, use \x0B instead of \v.) \0 null character (U+0000 <control-0000> ) (only if the next character is not a decimal
Escape_character
Set of rules defining correctly structured programs
following words refer to literal values used by the language. true false null JavaScript also defines the following global constants, which are not keywords
JavaScript_syntax
Abugida-type writing system
and Sanskrit. A special character of the script, the Soyombo symbol, became a national symbol of Mongolia and has appeared on the national flag and emblem
Soyombo_script
Computer programming identifier naming convention
attacks that can be caused by using raw user input) szName : variable is a null-terminated string ("sz"); this was one of Simonyi's original suggested prefixes
Hungarian_notation
Mathematical concept
boundless, limitless, or endless. It is denoted by ∞, called the infinity symbol. From the time of the ancient Greeks, the philosophical nature of infinity
Infinity
Used to count, measure, and label
dedicated symbols called numerals; for example, "eleven" is a number word and "11" is the corresponding numeral. As only a limited list of symbols can be
Number
Data compression technique
special node used to represent symbols which are 'not yet transferred'. algorithm for adding a symbol is leaf_to_increment := NULL p := pointer to the leaf
Adaptive_Huffman_coding
ASCII-compatible variable-width encoding of Unicode
the null character U+0000 uses the two-byte overlong encoding 0xC0 0x80 instead of just 0x00. Modified UTF-8 strings never contain any actual null bytes
UTF-8
Device that modulates an analog carrier signal to encode digital information
could transmit and receive four distinct symbols (two bits per symbol), transmitted 1,200 bits by sending 600 symbols per second (600 baud) using phase-shift
Modem
Type of substitution cipher
is a geometric simple substitution cipher, which exchanges letters for symbols which are fragments of a grid. The example key shows one way the letters
Pigpen_cipher
NULL SYMBOL
NULL SYMBOL
Boy/Male
Celtic
Champion.
Male
English
Medieval pet form of English Oliver, probably NOLL means "elf army."
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
Girl/Female
Greek American English French
Shining light. The bright one.
Female
English
Pet form of English Eleanor, NELL means "foreign; the other."
Male
Hungarian
Hungarian form of Greek Emmanouel, EMÃNUEL means "God is with us."
Boy/Male
Shakespearean
Love's Labours Lost' A constable.
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 : unexplained.Possibly a shortened form of any of several German compound surnames formed with Full- or Füll-.
Girl/Female
Arabic
Arabian Jasmine
Boy/Male
Hindu
Battle maiden
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.
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
British, English, Spanish
Strong Leader; Empty
Surname or Lastname
English
English : from the Old English personal name Cula.Americanized spelling of German and Swedish Kall or German Koll.
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.
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
Grinder
Girl/Female
Afghan, Australian, Danish, Swedish
God
Surname or Lastname
English
English : variant of Hill 1.English : from a pet form of Hugh.
NULL SYMBOL
NULL SYMBOL
Boy/Male
Biblical
He.
Male
Hebrew
(יִצְחָק) Hebrew name YITZCHAK means "he will laugh." In the bible, this is the name of the son of Abraham and father of Esau and Jacob. The Anglicized form if Isaac.
Girl/Female
Hindu
The Moon
Girl/Female
Arabic, Greek
Warrior Queen of Syria; The Name is Barbaric in Origin
Boy/Male
Hindu, Indian
Brave Man
Girl/Female
Arabic, Muslim
Able; Experienced; Skilful
Girl/Female
Indian, Marathi
A Writing God
Surname or Lastname
English
English : variant spelling of Weatherby.
Boy/Male
Hindu
Boy/Male
Indian
Thought, Imagination, Ecstasy, Mirth, Devotion
NULL SYMBOL
NULL SYMBOL
NULL SYMBOL
NULL SYMBOL
NULL SYMBOL
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.
a.
Of or pertaining to a bull; resembling a bull; male; large; fierce.
v. t.
To strip off or separate the hull or hulls of; to free from integument; as, to hull corn.
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.
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 move or operate by the motion of drawing towards one; as, to pull a bell; to pull an oar.
v. i.
To become dull or stupid.
n.
A knob, handle, or lever, etc., by which anything is pulled; as, a drawer pull; a bell pull.
v. t.
To heat, sweeten, and enrich with spices; as, to mull wine.
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 promontory; as, the Mull of Cantyre.
n.
The act of rowing; as, a pull on the river.
a.
Full to the brim; quite full; chock-full.
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.
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.
Quite full; choke-full.
a.
No; not any; as, nul disseizin; nul tort.
n.
A cully; a dupe; a gull. See Cully.
v. t.
To dispirit or deaden; to dull or blunt.
n.
A contest; a struggle; as, a wrestling pull.