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class="vector-menu-heading"> Pagine per utenti anonimi <a href="/wiki/Aiuto:Benvenuto" aria-label="Ulteriori informazioni sulla contribuzione"><span>ulteriori informazioni</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Speciale:MieiContributi" title="Un elenco delle modifiche fatte da questo indirizzo IP [y]" accesskey="y"><span>contributi</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Speciale:MieDiscussioni" title="Discussioni sulle modifiche fatte da questo indirizzo IP [n]" accesskey="n"><span>discussioni</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" 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vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Attiva/disattiva la sottosezione Utilizzo</span> </button> <ul id="toc-Utilizzo-sublist" class="vector-toc-list"> <li id="toc-Digitazione" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Digitazione"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Digitazione</span> </div> </a> <ul id="toc-Digitazione-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Linguaggi_di_programmazione" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Linguaggi_di_programmazione"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>Linguaggi di programmazione</span> </div> </a> <ul id="toc-Linguaggi_di_programmazione-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Riga_di_comando" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Riga_di_comando"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.3</span> <span>Riga di comando</span> </div> </a> <ul id="toc-Riga_di_comando-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Note" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Note"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Note</span> </div> </a> <ul id="toc-Note-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Voci_correlate" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Voci_correlate"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Voci correlate</span> </div> </a> <ul id="toc-Voci_correlate-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Indice" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Mostra/Nascondi l'indice" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Mostra/Nascondi l'indice</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Trattino-meno</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Vai a una voce in un'altra lingua. Disponibile in 17 lingue" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-17" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">17 lingue</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%B4%D8%B1%D8%B7%D8%A9_(%D8%B9%D9%84%D8%A7%D9%85%D8%A9)" title="شرطة (علامة) - arabo" lang="ar" hreflang="ar" data-title="شرطة (علامة)" data-language-autonym="العربية" data-language-local-name="arabo" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-de badge-Q70894304 mw-list-item" title=""><a href="https://de.wikipedia.org/wiki/Bindestrich-Minus" title="Bindestrich-Minus - tedesco" lang="de" hreflang="de" data-title="Bindestrich-Minus" data-language-autonym="Deutsch" data-language-local-name="tedesco" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Hyphen-minus" title="Hyphen-minus - inglese" lang="en" hreflang="en" data-title="Hyphen-minus" data-language-autonym="English" data-language-local-name="inglese" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Minusstreko" title="Minusstreko - esperanto" lang="eo" hreflang="eo" data-title="Minusstreko" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Guion_menos" title="Guion menos - spagnolo" lang="es" hreflang="es" data-title="Guion menos" data-language-autonym="Español" data-language-local-name="spagnolo" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%AE%D8%B7_%D9%BE%DB%8C%D9%88%D9%86%D8%AF-%D9%85%D9%86%D9%81%DB%8C" title="خط پیوند-منفی - persiano" lang="fa" hreflang="fa" data-title="خط پیوند-منفی" data-language-autonym="فارسی" data-language-local-name="persiano" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%B9%E0%A4%BE%E0%A4%87%E0%A4%AB%E0%A4%A8-%E0%A4%8B%E0%A4%A3" title="हाइफन-ऋण - hindi" lang="hi" hreflang="hi" data-title="हाइफन-ऋण" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%83%8F%E3%82%A4%E3%83%95%E3%83%B3%E3%83%9E%E3%82%A4%E3%83%8A%E3%82%B9" title="ハイフンマイナス - giapponese" lang="ja" hreflang="ja" data-title="ハイフンマイナス" data-language-autonym="日本語" data-language-local-name="giapponese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%ED%95%98%EC%9D%B4%ED%94%88_%EB%A7%88%EC%9D%B4%EB%84%88%EC%8A%A4" title="하이픈 마이너스 - coreano" lang="ko" hreflang="ko" data-title="하이픈 마이너스" data-language-autonym="한국어" data-language-local-name="coreano" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ks mw-list-item"><a href="https://ks.wikipedia.org/wiki/%DB%81%D8%A7%DB%8C%D9%BE%DA%BE%D9%86_-_%D9%85%D8%A7%DB%8C%D9%86%D8%B3" title="ہایپھن - ماینس - kashmiri" lang="ks" hreflang="ks" data-title="ہایپھن - ماینس" data-language-autonym="कॉशुर / کٲشُر" data-language-local-name="kashmiri" class="interlanguage-link-target"><span>कॉशुर / کٲشُر</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Liggend_streepje_(leesteken)" title="Liggend streepje (leesteken) - olandese" lang="nl" hreflang="nl" data-title="Liggend streepje (leesteken)" data-language-autonym="Nederlands" data-language-local-name="olandese" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/H%C3%ADfen-menos" title="Hífen-menos - portoghese" lang="pt" hreflang="pt" data-title="Hífen-menos" data-language-autonym="Português" data-language-local-name="portoghese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Vija_ndar%C3%ABse-minus" title="Vija ndarëse-minus - albanese" lang="sq" hreflang="sq" data-title="Vija ndarëse-minus" data-language-autonym="Shqip" data-language-local-name="albanese" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%A6%D1%80%D1%82%D0%B8%D1%86%D0%B0-%D0%BC%D0%B8%D0%BD%D1%83%D1%81" title="Цртица-минус - serbo" lang="sr" hreflang="sr" data-title="Цртица-минус" data-language-autonym="Српски / srpski" data-language-local-name="serbo" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Bindestreck-minus" title="Bindestreck-minus - svedese" lang="sv" hreflang="sv" data-title="Bindestreck-minus" data-language-autonym="Svenska" data-language-local-name="svedese" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E9%80%A3%E5%AD%97%E6%9A%A8%E6%B8%9B%E8%99%9F" title="連字暨減號 - cinese" lang="zh" hreflang="zh" data-title="連字暨減號" data-language-autonym="中文" data-language-local-name="cinese" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Li%C3%A2n-oe%CC%8Dh_ki%C3%A1m-h%C5%8D" title="Liân-oe̍h kiám-hō - min nan" lang="nan" hreflang="nan" data-title="Liân-oe̍h kiám-hō" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="min nan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q617884#sitelinks-wikipedia" title="Modifica collegamenti interlinguistici" class="wbc-editpage">Modifica collegamenti</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespace"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Trattino-meno" title="Vedi la voce [c]" accesskey="c"><span>Voce</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Discussione:Trattino-meno" rel="discussion" title="Vedi le discussioni relative a questa pagina [t]" accesskey="t"><span>Discussione</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" 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id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Da Wikipedia, l'enciclopedia libera.</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="it" dir="ltr"><style data-mw-deduplicate="TemplateStyles:r130658281">body:not(.skin-minerva) .mw-parser-output .hatnote.nota-disambigua{clear:both;margin-top:0;padding:.05em .5em}</style> <style data-mw-deduplicate="TemplateStyles:r139142988">.mw-parser-output .hatnote-content{align-items:center;display:flex}.mw-parser-output .hatnote-icon{flex-shrink:0}.mw-parser-output .hatnote-icon img{display:flex}.mw-parser-output .hatnote-text{font-style:italic}body:not(.skin-minerva) .mw-parser-output .hatnote{border:1px solid #CCC;display:flex;margin:.5em 0;padding:.2em .5em}body:not(.skin-minerva) .mw-parser-output .hatnote-text{padding-left:.5em}body.skin-minerva .mw-parser-output .hatnote-icon{padding-right:8px}body.skin-minerva .mw-parser-output .hatnote-icon img{height:auto;width:16px}body.skin--responsive .mw-parser-output .hatnote a.new{color:#d73333}body.skin--responsive .mw-parser-output .hatnote a.new:visited{color:#a55858}</style> <div class="hatnote noprint nota-disambigua"> <div class="hatnote-content"><span class="noviewer hatnote-icon" typeof="mw:File"><span><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Nota_disambigua.svg/18px-Nota_disambigua.svg.png" decoding="async" width="18" height="18" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Nota_disambigua.svg/27px-Nota_disambigua.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Nota_disambigua.svg/36px-Nota_disambigua.svg.png 2x" data-file-width="200" data-file-height="200" /></span></span> <span class="hatnote-text"><a href="/wiki/Aiuto:Disambiguazione" title="Aiuto:Disambiguazione">Disambiguazione</a> – "-" rimanda qui. Se stai cercando il simbolo meno, vedi <b><a href="/wiki/Meno_(matematica)" title="Meno (matematica)">Meno (matematica)</a></b>.</span></div> </div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Plus_Minus_Hyphen-minus.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/cc/Plus_Minus_Hyphen-minus.svg/220px-Plus_Minus_Hyphen-minus.svg.png" decoding="async" width="220" height="63" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/cc/Plus_Minus_Hyphen-minus.svg/330px-Plus_Minus_Hyphen-minus.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/cc/Plus_Minus_Hyphen-minus.svg/440px-Plus_Minus_Hyphen-minus.svg.png 2x" data-file-width="210" data-file-height="60" /></a><figcaption>Il trattino-meno (ultimo a destra) rispetto ai simboli <a href="/wiki/Pi%C3%B9" title="Più">più</a> e <a href="/wiki/Meno_(matematica)" title="Meno (matematica)">meno</a></figcaption></figure> <p>Il <b>trattino-meno</b> (in <a href="/wiki/Lingua_inglese" title="Lingua inglese">inglese</a> <span dir="ltr" lang="en"><i>hyphen-minus</i></span>) è un carattere che si trova alla posizione 2D<sub><a href="/wiki/Esadecimale" class="mw-redirect" title="Esadecimale">HEX</a></sub> nella codifica <a href="/wiki/ASCII" title="ASCII">ASCII</a> e negli standard che ne sono derivati. Viene usato come <a href="/wiki/Lineetta" title="Lineetta">lineetta</a>, <a href="/wiki/Meno_(matematica)" title="Meno (matematica)">segno meno</a> e <a href="/wiki/Tratto_d%27unione" title="Tratto d'unione">tratto d'unione</a>. Questo fu un compromesso che aveva senso nelle prime <a href="/wiki/Macchina_per_scrivere" title="Macchina per scrivere">macchine per scrivere</a> a <a href="/wiki/Tipo_di_carattere#Proporzionalità" title="Tipo di carattere">spaziatura fissa</a> e nei primi computer ma viene considerato inelegante in una corretta scrittura del testo. Nonostante ciò il suo uso persiste in quanto facile da inserire tramite la tastiera, ben conosciuto e nella stessa posizione in tutti i più comuni set di caratteri. </p><p>La codifica informatica richiede il trattino-meno nei calcoli e per i numeri negativi<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Descrizione">Descrizione</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Trattino-meno&veaction=edit&section=1" title="Modifica la sezione Descrizione" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Trattino-meno&action=edit&section=1" title="Edit section's source code: Descrizione"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>L'uso di un singolo carattere sia per il trattino che per il meno era un compromesso fatto nei primi giorni delle macchine da scrivere a larghezza fissa (carattere a spaziatura fissa) e dei display dei computer<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>. Tuttavia, lo standard Unicode specifica caratteri distinti per i trattini, il segno meno e vari tipi di trattino, incluso il trattino Unicode con punto di codice U + 2010. L'utilizzo del trattino-meno persiste in molti contesti, tuttavia, come è noto, facile da inserire sulle tastiere nella stessa posizione in tutti i set di caratteri comuni. Secondo lo standard Unicode, il trattino U + 2010 è "preferito" rispetto al trattino meno, sebbene lo standard stesso utilizzi il trattino meno come carattere trattino<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup>. </p><p>Nei caratteri proporzionali il trattino-meno è solitamente la dimensione di un trattino Unicode, e più piccolo di un segno meno (che di solito ha la stessa larghezza di un segno più). Ciò si traduce in un aspetto poco attraente se combinato con i segni più. Anche molti programmi di videoscrittura permetteranno un ritorno a capo dopo un trattino-meno, a differenza del segno meno corretta che viene trattata come un simbolo matematico non è diverso (tipograficamente) da un qualsiasi numero unspaced o una lettera. </p> <div class="mw-heading mw-heading2"><h2 id="Utilizzo">Utilizzo</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Trattino-meno&veaction=edit&section=2" title="Modifica la sezione Utilizzo" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Trattino-meno&action=edit&section=2" title="Edit section's source code: Utilizzo"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Digitazione">Digitazione</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Trattino-meno&veaction=edit&section=3" title="Modifica la sezione Digitazione" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Trattino-meno&action=edit&section=3" title="Edit section's source code: Digitazione"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Questo carattere viene digitato quando si desidera un trattino, un segno meno o un trattino (come in "volo Boston-Londra"). Basandosi sulle vecchie convenzioni delle macchine da scrivere, è comune usare una coppia -- per rappresentare un trattino lungo<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup>, e alcuni programmi di videoscrittura convertono automaticamente questa coppia in un trattino lungo. Il carattere può anche essere digitato più volte per simulare una linea orizzontale (sebbene sulla maggior parte delle macchine da scrivere la digitazione ripetuta del trattino basso produrrà una linea più morbida). L'alternanza del trattino meno con gli spazi produce una linea "tratteggiata" per indicare dove la carta deve essere tagliata. Il barrato eccessivo su una sezione di testo con questi viene utilizzato per barrare. </p> <div class="mw-heading mw-heading3"><h3 id="Linguaggi_di_programmazione">Linguaggi di programmazione</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Trattino-meno&veaction=edit&section=4" title="Modifica la sezione Linguaggi di programmazione" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Trattino-meno&action=edit&section=4" title="Edit section's source code: Linguaggi di programmazione"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>La maggior parte dei linguaggi di programmazione utilizza il trattino meno per indicare la sottrazione e la negazione<sup id="cite_ref-c_6-0" class="reference"><a href="#cite_note-c-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-haskell_7-0" class="reference"><a href="#cite_note-haskell-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup>. Non è quasi mai usato per indicare un intervallo, a causa dell'ambiguità con la sottrazione. In genere altri caratteri, come Unicode U + 2212 - MINUS SIGN non vengono riconosciuti. </p><p>In alcuni linguaggi di programmazione <code>--</code> segna l'inizio di un commento. Allo stesso modo, può occasionalmente avviare il blocco della firma. YAML utilizza un triplo trattino <code>---</code> per terminare una sezione. </p> <div class="mw-heading mw-heading3"><h3 id="Riga_di_comando">Riga di comando</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Trattino-meno&veaction=edit&section=5" title="Modifica la sezione Riga di comando" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Trattino-meno&action=edit&section=5" title="Edit section's source code: Riga di comando"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Il carattere viene spesso utilizzato quando si specificano le opzioni della riga di comando, una convenzione iniziata principalmente da Unix. Le opzioni potrebbero essere <code>-x</code> o <code>-y</code>; un utente può specificare entrambi utilizzando <code>-xy</code>. Diverse implementazioni della funzione <code>getopt</code> consentono a due trattini meno di specificare nomi di opzioni "lunghi" come<code>--description</code>, che sono molto più facili da leggere mentre sono molto più difficili da memorizzare e scrivere (il software recente non si preoccupa del numero di trattini meno e non consente combinazioni di opzioni di una sola lettera o richiede all'utente di riorganizzarle in modo non corrisponde a un'opzione lunga). Un doppio trattino meno da solo (seguito da uno spazio) indica che non ci sono più opzioni, il che è utile quando è necessario specificare un nome di file che inizia con un trattino-meno. Un'opzione di un trattino meno (seguito da uno spazio) può essere riconosciuta al posto del nome di un file e indica che stdin deve essere letto. </p> <div class="mw-heading mw-heading2"><h2 id="Note">Note</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Trattino-meno&veaction=edit&section=6" title="Modifica la sezione Note" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Trattino-meno&action=edit&section=6" title="Edit section's source code: Note"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><a href="#cite_ref-1"><b>^</b></a> <span class="reference-text"><cite class="citation libro" style="font-style:normal"> Jukka K. Korpela, <a rel="nofollow" class="external text" href="https://books.google.com/books?id=PcWU2yxc8WkC&pg=PA382"><span style="font-style:italic;">Unicode explained</span></a>, O'Reilly, 2006, p. 382, <a href="/wiki/ISBN" title="ISBN">ISBN</a> <a href="/wiki/Speciale:RicercaISBN/978-0-596-10121-3" title="Speciale:RicercaISBN/978-0-596-10121-3">978-0-596-10121-3</a>.</cite></span> </li> <li id="cite_note-2"><a href="#cite_ref-2"><b>^</b></a> <span class="reference-text"><cite class="citation pubblicazione" style="font-style:normal"> Eric Fischer, <span style="font-style:italic;">The Evolution of Character Codes, 1874-1968</span>.</cite></span> </li> <li id="cite_note-3"><a href="#cite_ref-3"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="https://www.unicode.org/versions/Unicode13.0.0/ch06.pdf"><span style="font-style:italic;">The Unicode Standard, Version 13.0, Chapter 6.2</span></a> (<span style="font-weight: bolder; font-size:80%"><abbr title="documento in formato PDF">PDF</abbr></span>), su <span style="font-style:italic;">unicode.org</span>, 2020.</cite></span> </li> <li id="cite_note-4"><a href="#cite_ref-4"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> Jukka Korpela, <a rel="nofollow" class="external text" href="https://jkorpela.fi/dashes.html#usage"><span style="font-style:italic;">Dashes and Hyphens § Typographic Usage</span></a>, su <span style="font-style:italic;">jkorpela.fi</span>. <small>URL consultato il 30 dicembre 2020</small>.</cite></span> </li> <li id="cite_note-5"><a href="#cite_ref-5"><b>^</b></a> <span class="reference-text"><cite class="citation libro" style="font-style:normal"> Nigel French, <a rel="nofollow" class="external text" href="https://books.google.com/books?id=l_YJY3JalQgC&q=double+hyphen+typewriter+em+dash&pg=PA72"><span style="font-style:italic;">InDesign Type: Professional Typography with Adobe InDesign CS2</span></a>, Adobe Press, 2006, p. 72, <a href="/wiki/ISBN" title="ISBN">ISBN</a> <a href="/wiki/Speciale:RicercaISBN/9780321385444" title="Speciale:RicercaISBN/9780321385444">9780321385444</a>. <small>URL consultato il 4 luglio 2020</small>.</cite></span> </li> <li id="cite_note-c-6"><a href="#cite_ref-c_6-0"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a href="/wiki/Dennis_Ritchie" title="Dennis Ritchie">Dennis Ritchie</a>, <a rel="nofollow" class="external text" href="https://www.bell-labs.com/usr/dmr/www/cman.pdf"><span style="font-style:italic;">C Reference Manual</span></a> (<span style="font-weight: bolder; font-size:80%"><abbr title="documento in formato PDF">PDF</abbr></span>), su <span style="font-style:italic;"><a href="/wiki/Bell_Labs" class="mw-redirect" title="Bell Labs">Bell Labs</a></span>, c. 1975. <small>URL consultato il 7 dicembre 2016</small>.</cite></span> </li> <li id="cite_note-haskell-7"><a href="#cite_ref-haskell_7-0"><b>^</b></a> <span class="reference-text"><cite class="citation libro" style="font-style:normal"> Simon Marlow (a cura di), <a rel="nofollow" class="external text" href="https://www.haskell.org/definition/haskell2010.pdf"><span style="font-style:italic;">Haskell 2010 Language Report</span></a> (<span style="font-weight: bolder; font-size:80%"><abbr title="documento in formato PDF">PDF</abbr></span>). <small>URL consultato il 7 dicembre 2016</small>.</cite></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Voci_correlate">Voci correlate</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Trattino-meno&veaction=edit&section=7" title="Modifica la sezione Voci correlate" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Trattino-meno&action=edit&section=7" title="Edit section's source code: Voci correlate"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Lineetta" title="Lineetta">Lineetta</a></li> <li><a href="/wiki/Tratto_d%27unione" title="Tratto d'unione">Tratto d'unione</a></li> <li><a href="/wiki/Meno_(matematica)" title="Meno (matematica)">Meno (matematica)</a></li></ul>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; 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