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Do nothing“”” A commentLanguages with Line Comments include JavaScript, C, Python, Java, Perl, Ruby, PHP, Go, SQL, TypeScript, C#, R, PowerShell, Bash, Rust, Swift, MATLAB, Scala, Lua, Kotlin, Haskell, Clojure, CoffeeScript, Elixir, Erlang, Prolog, SAS, Objective-C, Julia, Dart, Solidity, COBOL, Zig, Racket, Visual Basic, WebAssembly, YAML, Nim, TOML, Fortran, Ada, PostgreSQL, Crystal, MySQL, Reason, GraphQL, D, Elm, Haxe, Pug, Scheme, Chapel, awk, Groovy, Tex, LLVM IR, F#, Gleam, HCL, ClojureScript, PureScript, HAML, Tcl, VHDL, JSON5, Rescript, Idris, Odin, Forth, Deno, Protocol Buffers, Visual Basic .NET, Ini, Make, APL, Yacc, ARM, Embedded Crystal, OpenCL, LaTeX, C3, Red, J, fish, Lean, Maple, starlark, Flow, sed, ANTLR, V, KaTeX, Dhall, Fennel, Stata, Delphi, ABAP, ActionScript, Pandas, Verilog, Pony, Ballerina, PRQL, Hy, FLUX, AutoHotkey, BASIC, Wren, PostScript, Less, MUMPS, Common Lisp, Cap'n Proto, Eiffel, Wa-lang, Smali, PEG.js, NetLogo, DOT, MoonScript, API Blueprint, Vala, Lex, Koka, Zephir, M4, Pig Latin, Logo, Jsonnet, Bicep, Frege, VBScript, MLIR, Dafny, Batchfile, carp, QML, PL/SQL, Eve, Nginx, Nearley, Terra, GNU Octave, Halide, Agda, CIR, Futhark, MIPS architecture, Processing, SPARQL, AMPL, unison, Taichi, VBA, Emacs Lisp, Sage, Squirrel, Mercury, Expect, POV-Ray SDL, OpenSCAD, Hack, Hjson, GAP, Lil, Ron, YASnippet, SystemVerilog, Applescript, mgmt, Ceylon, PowerBuilder, AspectJ, x86 Assembly, QBasic, NumPy, HLSL, ECL, GLSL, progsbase, Cryptol, Cue, Scilab, TLA+, Click, K, idyll, WDL, Observable, Clean, Slope, AutoIt, AGC, JAI, Nemerle, eC, Bison, Simula, wisp, Golo, Ring, Scroll, datascript, Felix, Transact-SQL, CWL, Datalog, Boo, nomnoml, Logica, BCPL, SuperCollider, CIL, SCSS, Mu, Xojo, Dylan, REBOL, SugarSS, Flow9, X10, Raku, ArkScript, JCL, xBase, Oz, Wax, Nit, Gosu, Modelica, mun-lang, Shen, Veryl, ATS, NewLisp, Java Properties, Cyber, LiveScript, Fancy, LFE, CLIPS, Io, SourcePawn, Fantom, Pike, NCAR Command Language, NSIS, PAWN, PL/pgSQL, Icon, Dockerfile, Praat Script, Filebench WML, Argdown, Turing, Nix, Reia, BlitzMax, Whiley, Objective C++, Lasso, LilyPond, Csound, P4, clay, E, dlvm, PureBasic, FoxPRO, LiveCode, Jule, lispyscript, JSON with Comments, GDScript, Euphoria, IGOR Pro, Logos, Angelscript, Gherkin, Cg, Clipper, Ch, JADE, Monkey, Objective-J, Guile, SNOBOL, spry, Neut, Croc, BlitzBasic, Classroom Object Oriented Language, Harbour, Alloy, Ligo, Spatial, Volt, Concise Encoding, JSLT, Ragel, Cypher Query Language, dex, Apex, OCL, Pan, CIL, Ren'Py, DAX, Mask, MQL5, Falcon, Netwide Assembler, Gerbil Scheme, Vigil, C shell, Java Bytecode, PicoLisp, OX, Gettext Catalog, spiral, popr, Seed7, muPad, Tea, HuJSON, Not Quite C, NestedText, UNLAMBDA, Augmented Backus-Naur Form, Script.NET, Linden Scripting Language, Opal, High Level Assembly, Gentoo Ebuild, DM, LPC, PIC, Cwerg, NetLinx, Redcode, Eclipse Command Language, Jasmin, FloScript, ldpl, Vale, Game Maker Language, RELAX NG, BitBake, S-PLUS, SETL, SMT, HOPE, Z, Sophia, Dc, Spin, Sieve mail filtering language, BETA, Strips, Unicon, Cycript, HiveQL, Structured Query Reporter, Slice, storyscript, Nymph, LoomScript, Cell, MiniD, Sather, gentee, Hocon, Rc, Claro, Ezhil, CartoCSS, pointless, Refal, Savi, LookML, Grammatical Framework, SRecode Template, Type Language, Brightscript, PEG, Adventure Game Studio Script, Not eXactly C, KRL, Maya Embedded Language, GCC Machine Description, ShaderLab, tht, Project Mentat, Charity, kai, BLISS, Action!, Parser 3, Wart, Frink, SAKO, Mouse, HXML, silk, manool, QB64, Aldor, S-algol, Heron, Recfiles, Yet Another Scripting Language, Aardvark, KiXtart, JS++, OpenVera, Alpine Abuild, mmCIF, XBase++, Object File Format, parasail, NS Basic, Yoix, winxed, Quaint, Mary, MVEL, PowerBASIC, neeilang, xxl, carth, EuLisp, Language Server Index Format, Easytrieve, Lite-C, Rita, taf, Judoscript, Bel, Fjölnir, owen-lang, Rust MIR, Xbasic, Crap, Boron, Pawn, Amazon Redshift, PROMAL, Swift SIL, FutureBASIC, OEM, PowerQuery M, Uniform eXchange Format, Q#, VHDL-AMS, SimCode, Ion, BuddyScript, Fable, Tuple space, blz, z80, True BASIC, Ren, ISETL, omega, MACRO-10, Pnuts, hilvl, AmbientTalk, Atomese, Action Code Script, JSL, ActiveVFP, beads-lang, fizz, flagship, Guix Workflow Language, PromQL, Operational Control Language, CLOS, Boogie, epsilon, Lexon, Plot, rosette-lang, Spice, Zimpl, boa, lain, stella, Sweet Expressions, T3X, verifpal, holyc, ThinBasic, FML, StarOffice Basic, Caché Basic, USD, Bla, luau, OptimJ, Finite State Language, Module Management System, Soy, Parrot BASIC, XBLite, ca65 Assembly, GraphQL Schema Definition Language, Literate Agda, rbs, Reactive Plan Language, WxBasic, Robots.txt, StruQL, SubX, Yedalog, Turbo Basic, Treelang, ctalk-lang, dslx, LP Format, Portable Bit Map Format, Netpbm grayscale image format, ppm-format, PacmanConf, PkgConfig, wescheme, CFScript, ddfql, turnstile, Creative Basic, tremor-query, Lighttpd configuration file, rbscript, sora, zephyr-asdl
Languages without Line Comments include HTML, CSS, XML, JSON, Mathematica, Markdown, Pascal, SPSS, OCaml, Smalltalk, SVG, Standard ML, XQuery, ML, Regular Expressions, Wolfram Language, Modula-2, Rexx, OWL, Modula-3, Object Pascal, SAT
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