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Programming languages binary operator
In the C and C++ programming languages, the comma operator (represented by the token ,) is a binary operator that evaluates its first operand and discards
Comma_operator
an operator is also in C. Note that C does not support operator overloading. When not overloaded, for the operators &&, ||, and , (the comma operator),
Operators_in_C_and_C++
Punctuation mark (,)
The comma , is a punctuation mark that appears in several variants in different languages. Some typefaces render it as a small line, slightly curved or
Comma
Topics referred to by the same term
Archives Comma Press, a British publisher Comma (butterfly), several species of butterfly in the genus Polygonia Comma operator, an operator in C and
Comma_(disambiguation)
Punctuation mark (;)
characters, whereas commas have continued to be widely used in programming for lists (and rare other uses, such as the comma operator that separates expressions
Semicolon
2020 edition of the C++ programming language standard
std::result_of and std::result_of_t. Deprecated features: Use of comma operator in subscript expressions has been deprecated (most of) volatile has
C++20
Performing order of mathematical operations
Common operator notation (for a more formal description) Hyperoperation Logical connective#Order of precedence Operator associativity Operator overloading
Order_of_operations
Concept in computer programming
g() it is possible that either f() or g() will be executed first. The comma operator introduces a sequence point, and therefore in the code f(), g() the
Sequence_point
General-purpose programming language
during evaluation of expressions containing certain operators (&&, ||, ?: and the comma operator). This permits a high degree of object code optimization
C_(programming_language)
2023 edition of the C++ programming language standard
std::numeric_limits::has_denorm Reverted deprecated features: Use of comma operator in subscript expressions was no longer deprecated but the semantics
C++23
Templates in computer programming
proceeds by separating the function call arguments by commas, which are not equivalent to the comma operator. Therefore, foo(args)...; will never work. Moreover
Variadic_template
Setting or re-setting the value associated with a variable name
Deconstruct(out string a, out int b) { a = "foo"; b = 1; } In C and C++, the comma operator is similar to parallel assignment in allowing multiple assignments to
Assignment_(computer_science)
Mathematics construct
involved the comma punctuation mark. The name persists even though standard notation has changed, since the use of a comma as an operator is potentially
Comma_category
How software progresses through its implementation
form above. Similar constructions are possible in C and C++ with the comma operator, and other languages with similar constructs, which allow shoehorning
Control_flow
Slanting line punctuation mark (/)
or technical names. Once used as the equivalent of the modern period and comma, the slash is now used to represent division and fractions, as a date separator
Slash_(punctuation)
Programming language derived from Perl
are now optional: if is-true() { for @array { ... } } Also, the , (comma) operator is now a list constructor, so enclosing parentheses are no longer required
Raku_(programming_language)
Form of text that defines C code
an operator is also in C. Note that C does not support operator overloading. When not overloaded, for the operators &&, ||, and , (the comma operator),
C_syntax
Syntactic construction in computer programming
where a comma would usually appear. The original usage refers to the ")letters:(" construction in ALGOL 60. Newer usage refers to the "=>" operator present
Fat_comma
Header file for C programs
evaluated. The assert macro does not include an error message. However the comma operator can be used to add it to the printed expression, as in assert(("Not
Assert.h
Comparison of two programming languages
employed using the && and || operators together with operators such as ++, +=, the comma operator, etc. The && and || operators thereby function as combinations
Comparison_of_Pascal_and_C
Notation for representing an integer in source code
programming languages as radix point, list separator (and in C/C++, the comma operator), and token separator. Examples include: int oneMillion = 1_000_000;
Integer_literal
Computer programming operation
2 Arrays are zero-based in PowerShell and can be defined using the comma operator: PS> $a = 2, 5, 7, 3, 8, 6, 4, 1 PS> # Print the first two elements
Array_slicing
Basic programming language construct
coalesing: x ?? y Notable C and C++ operators Address-of operator: &x Dereference: *p Comma: e, f Compound operators Compound assignment (aka augmented
Operator (computer programming)
Operator_(computer_programming)
parameters in a function definition. In particular, JavaScript defines a , (comma) operator in the context of a parenthetical expression. It is no mere coincidence
Examples of anonymous functions
Examples_of_anonymous_functions
Specification of a derivative along a tangent vector of a manifold
and working with a connection on a manifold by means of a differential operator, to be contrasted with the approach given by a principal connection on
Covariant_derivative
Topics referred to by the same term
mathematical well-definition A mathematical symbol for "approaching from above" A comma category, in category theory Down (game theory), a mathematical game An
↓
Punctuation to signal the end of a sentence (.)
marked a division in a thought occasioning a shorter breath (essentially a comma). The name period is first attested (as the Latin loanword peridos) in Ælfric
Full_stop
Mathematical symbol
symbol, such as a.b, is common when the symbol for the decimal point is a comma. Historically, computer language syntax was restricted to the ASCII character
Multiplication_sign
Traditional first example of a computer programming language
deviations in casing and punctuation, such as the presence or absence of the comma or exclamation mark. Some devices limit the format to specific variations
Hello,_world
Typographical symbol
multiplication sign (×), the centered dot (dot operator) can be used as a multiplication sign.[citation needed] Only a comma or full stop (period) may be used as
Middle_dot
Mathematical symbols (+ and −)
The plus sign (+) is a binary operator that indicates addition, as in 2 + 3 = 5. It can also serve as a unary operator that leaves its operand unchanged
Plus_and_minus_signs
Punctuation mark with two dots (:)
three maner of pauses [...] The shortest pause or intermission they called comma [...] The second they called colon, not a peece but as it were a member
Colon_(punctuation)
Record label founded by Emil E. Shalit in the 1940s
"Omopupa" / "Iyamabamiwi" 1429 Kings Of Caribbean Steel Band, voc Vivian Comma "Down In Soho" / "Rock 'n' Roll Susie" 1430 Lord Kitchener, Rupert Nurse
Melodisc_Records
multivariate function, the parentheses contain several expressions separated by commas, such as f ( x , y ) {\displaystyle f(x,y)} . 2. May also denote a product
Glossary of mathematical symbols
Glossary_of_mathematical_symbols
Punctuation or diacritical mark (')
for noun plurals, especially in loanwords ending in a vowel (as in ... Comma's are used, Philip Luckcombe, 1771) and in the consonants s, z, ch, sh, (as
Apostrophe
Revision of the C++ programming language released in 2026
constant-evaluation Variadic friends Oxford variadic comma, i.e. "Deprecate ellipsis parameters without a preceding comma." For example, the syntax void f(int a..
C++26
Protocol for real-time Internet chat and messaging
Some implementations allow multiple channels to be specified, separated by commas. Issues in the original design of IRC were the amount of shared state data
IRC
Device setting to suspend radio-frequency signal transmission
operator and applicable laws and regulations, you can re-enable Wi-Fi and Bluetooth while in airplane mode "Android: AIRPLANE_MODE_RADIOS". A comma separated
Airplane_mode
Sequence of characters that forms a search pattern
replace is given by s/re/replacement/ and patterns can be joined with a comma to specify a range of lines as in /re1/,/re2/. This notation is particularly
Regular_expression
Typographical symbol (*)
the asterisk is placed after all other punctuation marks (for example, commas, colons, or periods) except for the dash. Three spaced asterisks centered
Asterisk
Typographic character indicating a question (?)
may also occur at the end of a clause or phrase, where it replaces the comma : Is it good in form? style? meaning? or: Showing off for him, for all of
Question_mark
2026 American crewed spaceflight to the ISS
Crew-13 Launch of Crew-13 Names USCV-13 Mission type ISS crew transport Operator SpaceX Mission duration 2 days, 7 hours and 49 minutes (in progress) Spacecraft
SpaceX_Crew-13
Typographic symbol
a single vertical bar was a common variant of the virgula / used as a comma, or caesura mark. In Sanskrit and other Indian languages, a single vertical
Vertical_bar
Set of rules defining correctly structured programs
length of 2 myArray = [1, 2,]; // same array - Users can also have an extra comma at the end // It is also possible to not fill in parts of the array myArray
JavaScript_syntax
Vice President of the United States from 2021 to 2025
2024. Budryk, Zack (March 10, 2020). "Democratic senators ask prison operators for answers on coronavirus plans". The Hill. Archived from the original
Kamala_Harris
Grammatically correct sentence demonstrating lexical ambiguity
the punctuation markes [sic]: a period, a dash, a colon, a semicolon or a comma may signal different degrees of integration/separation between the groupings
James while John had had had had had had had had had had had a better effect on the teacher
James_while_John_had_had_had_had_had_had_had_had_had_had_had_a_better_effect_on_the_teacher
2008 Vampire Weekend "A-Punk" Yes Yes Yes 2008 Vampire Weekend "Oxford Comma" Yes Yes Yes 1987 Vaya Con Dios "Just A Friend of Mine" Yes Yes Unknown
List of downloadable English songs for the SingStar series
List_of_downloadable_English_songs_for_the_SingStar_series
Transmission of language with brief pulses
sequence of dits and dahs. The dit duration can vary for signal clarity and operator skill, but for any one message, once the rhythm is established, a half-beat
Morse_code
German cipher machine during World War II
forces. The Wehrmacht replaced a comma with ZZ and the question mark with FRAGE or FRAQ. The Kriegsmarine replaced the comma with Y and the question mark
Enigma_machine
Punctuation used with Chinese characters
full hanzi. ， (U+FF0C FULLWIDTH COMMA) is the comma (,). It cannot be used for enumerating a list; see "enumeration comma" below. ！ (U+FF01 FULLWIDTH EXCLAMATION
Chinese_punctuation
Programming language family
their values interpolated into a quoted list with the comma , unquote and comma-at ,@ splice operators. If the variable snue has the value (bar baz) then
Lisp_(programming_language)
High-level programming language
Arrays have their elements cast to strings after which they are joined by commas (,) Other objects are converted to the string [object Object] where Object
JavaScript
time (UTC) Rocket Flight number Launch site LSP Payload (⚀ = CubeSat) Operator Orbit Function Decay (UTC) Outcome Remarks 1 October 15:10 Falcon 9 Block
List of spaceflight launches in October–December 2026
List_of_spaceflight_launches_in_October–December_2026
Commercial satellite operator
Founded in 2001, U.S.-based XTAR was the world's first commercial satellite operator to provide services to government end-users on NATO Allied MILSATCOM assets
XTAR
All points and limit points in a subset of a topological space
fixed subset A ⊆ X {\displaystyle A\subseteq X} can be identified with the comma category ( A ↓ I ) . {\displaystyle (A\downarrow I).} This category — also
Closure_(topology)
Competitive algorithm for searching a problem space
solutions to optimization and search problems via biologically inspired operators such as selection, crossover, and mutation. Some examples of GA applications
Genetic_algorithm
Punctuation mark (!)
marks are occasionally placed mid-sentence with a function similar to a comma, for dramatic effect, although this usage is obsolete: "On the walk, oh
Exclamation_mark
Human-readable data serialization language
enclosing text in square brackets ([...]) with each entry separated by a comma. An associative array entry is represented using colon space in the form
YAML
Means of entering commands to software
copy: COPY source file a target file b (REPLACE OLDDATE) OS/360 operator commands use a comma-separated list of positional and keyword parameters; only documented
Command-line_interface
(see Container for type theory discussion). comma-separated values (CSV) A delimited text file that uses a comma to separate values. A CSV file stores tabular
Glossary_of_computer_science
Monetary symbol used in many national currencies
separator until 1942, when it switched to the Brazilian cruzeiro, with comma as the decimals separator. The dollar sign, officially with one stroke but
Dollar_sign
Versions of a JavaScript standard
single character from a given position in a string, and Array.isArray(). A comma after the final pair of values in an object (var example = { "property1":"value1"
ECMAScript_version_history
Natural number
In most English-speaking countries, it can be written with or without a comma or sometimes a period separating the thousands digit: 1,000. A group of
1000_(number)
1828 U.S. campaign issue
British. This passage has been lightly edited for readability, primarily commas and numerals, along with the excision by ellipsis of some distracting emotional
Andrew Jackson and the slave trade
Andrew_Jackson_and_the_slave_trade
Text processor used with C and C++ and other programming tools
directive, but rather an operator) __has_include (operator) __has_cpp_attribute (operator) __has_c_attribute (operator) __has_embed (operator) Until C++26, the
C_preprocessor
Programming language
Similarly, the function call f(x, y, z); can be written as x, y, z; f(); (commas and semicolons being largely interchangeable) or even x, y, z.f; or (x,
POP-2
Electronic display device for displaying digits and some letters
or other symbols. A decimal point or comma may be present as an additional segment, or pair of segments; the comma (used for triple-digit groupings or
Segment_display
an IRC operator on that server/network. Defined in RFC 1459. Syntax: PART <channels> [<message>] Causes a user to leave the channels in the comma-separated
List_of_IRC_commands
Set of rules defining correctly structured programs
names when discussing functions and operators (for example, "product" for ×/) but the core functions and operators provided by the language are denoted
APL_syntax_and_symbols
Lighthouse
Markings ‹The template Comma-separated entries is being considered for merging.› White (tower), black (lantern), ochre (trim) Operator Northern Lighthouse
Rona_Lighthouse
Spoken alphabet for radio communication
international radio communications, it was also adopted by most radio operators, whether military, civilian, or amateur. In 1956, NATO adopted the International
NATO_phonetic_alphabet
Triple-dot punctuation mark
following word (except if they are followed by a punctuation sign, such as a comma). In French, the ellipsis is commonly used at the end of lists to represent
Ellipsis
Typographical mark (`) (Freestanding grave accent)
expression in which comma-substitution may occur. It is identical to the plain quote, except that a nested expression prefixed with a comma is replaced with
Backtick
Arithmetical operation
Multiplication is often denoted by the cross symbol, ×, by the mid-line dot operator, ⋅, by juxtaposition, or, in programming languages, by an asterisk, *.
Multiplication
Character encoding standard
were used on some keyboards (others, including the No. 2, did not shift , (comma) or . (full stop) so they could be used in uppercase without unshifting)
ASCII
Data-interchange format
interoperability." JSON disallows "trailing commas", a comma after the last value inside a data structure. Trailing commas are a common feature of JSON derivatives
JSON
NASA infrared space telescope launched in 2026
Joint Dark Energy Mission (JDEM) Mission type Infrared space telescope Operator NASA / GSFC COSPAR ID 2026-199A SATCAT no. 100532 Website roman.gsfc.nasa
Nancy Grace Roman Space Telescope
Nancy_Grace_Roman_Space_Telescope
GNU replacement for the Bourne shell
In the following example of a full command string, metacharacters have a comma placed above them, ,, reserved words have a caret placed beneath them, ^
Bash_(Unix_shell)
Top-down parser utilizing recursion
expect(number); } while (accept(comma)); expect(semicolon); } if (accept(varsym)) { do { expect(ident); } while (accept(comma)); expect(semicolon); } while
Recursive_descent_parser
time (UTC) Rocket Flight number Launch site LSP Payload (⚀ = CubeSat) Operator Orbit Function Decay (UTC) Outcome Remarks 3 January 02:09:16 Falcon 9
List of spaceflight launches in January–March 2026
List_of_spaceflight_launches_in_January–March_2026
Pictorial representation of a facial expression
in Western style). Sometimes ㅡ (not an em-dash "—", but a vowel jamo), a comma (,) or an underscore (_) is added, and the two character sets can be mixed
Emoticon
Seventh launch of SpaceX Starship
Starship flight test 7 Mission type Flight test Operator SpaceX Mission duration 8 minutes, 26 seconds Range ~2,500 km (1,600 mi) Spacecraft properties
Starship_flight_test_7
Job control language for IBM mainframes
later ones are included, the omitted parameters must be represented by commas with no spaces, as in the TLBL statement above. DOS JCL to some extent mitigates
Job_Control_Language
(diacritic) Circumflex Combining Diacritical Marks : Colon Colon Semicolon , Comma Comma Decimal separator ⌘ Place of interest sign Command key, looped square
List of typographical symbols and punctuation marks
List_of_typographical_symbols_and_punctuation_marks
City in West Yorkshire, England
region. Leeds is much more a generalised concept place name in inverted commas, it is the city, but it is also the commuter villages and the region as
Leeds
1987 film by Alan Parker
times—and he had continued to bombard me with questions examining every dot and comma of my script. I had walked him through the locations we had found, read
Angel_Heart
Geostationary communications satellite
Astra communications satellite, built by Thales Alenia Space for owner/operator SES. Launched by SpaceX on 20 June 2024, the satellite is positioned in
Astra_1P
SignWriting: Sutton SignWriting (Unicode block) Supplemental Mathematical Operators (Unicode block) Miscellaneous Mathematical Symbols-A (Unicode block) Miscellaneous
List_of_Unicode_characters
General-purpose programming language
to a variable called DO101I. Note the slight visual difference between a comma and a period. Hollerith strings, originally allowed only in FORMAT and DATA
Fortran
Shell command for comparing file content
respective file. In many versions of GNU diff, each range can omit the comma and trailing value s, in which case s defaults to 1. Note that the only
Diff
C programming language standard, current revision
Archived (PDF) from the original on October 14, 2022. "WG14-N3033: Comma omission and comma deletion". open-std.org. 2022-07-20. Archived from the original
C23_(C_standard_revision)
City in Texas, United States
acres (13 km2) Dallas County Preserve System. The Joppa Preserve, the McCommas Bluff Preserve, and the Cedar Ridge Preserve are within the Dallas city
Dallas
time (UTC) Rocket Flight number Launch site LSP Payload (⚀ = CubeSat) Operator Orbit Function Decay (UTC) Outcome Remarks 1 July 23:46:00 Long March 4B
List of spaceflight launches in July–September 2026
List_of_spaceflight_launches_in_July–September_2026
Suite of advanced driver-assistance system features
disengaging. In February 2020, Car and Driver compared GM's Super Cruise, comma.ai and Autopilot. They called Autopilot "one of the best", highlighting
Tesla_Autopilot
time (UTC) Rocket Flight number Launch site LSP Payload (⚀ = CubeSat) Operator Orbit Function Decay (UTC) Outcome Remarks 1 April 22:35:12 SLS Block 1
List of spaceflight launches in April–June 2026
List_of_spaceflight_launches_in_April–June_2026
Association of one output to each input
{\displaystyle x\mapsto f(x,t_{0})} (read: "the map taking x to f of x comma t nought") represents this new function with just one argument, whereas
Function_(mathematics)
Topics referred to by the same term
Cohen–Daubechies–Feauveau wavelet Collider Detector at Fermilab Comma-delimited format, now referred to as .csv (comma-separated values) Common Data Format, NASA software
CDF
Interpreted programming language first released in 1987
Usenet message. The "canonical" JAPH as developed by Schwartz includes the comma at the end, although this is often omitted. Perl "golf" is the pastime of
Perl
Information that locates a structure
previous line. When addresses are written inline, line breaks are replaced by commas. Conventions on the placing of house numbers differ: either before or after
Address
List of standard postal address formats
in France), separated by a space. Separators such as punctuation (point, comma or other signs) or "nº", or "nr" are not allowed. Extension designation
Address format by country and area
Address_format_by_country_and_area
travel, tourism, insurance
COMMA OPERATOR
COMMA OPERATOR
COMMA OPERATOR
COMMA OPERATOR
COMMA OPERATOR
COMMA OPERATOR
COMMA OPERATOR
COMMA OPERATOR
COMMA OPERATOR
travel, tourism, insurance