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<h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Interactive Ruby</span></h1>
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<p><b>Interactive RuBy</b> ou <b>irb</b> est un <a href="Interpr%C3%A9teur_de_commandes" title="Interpréteur de commandes">interpréteur de commandes</a> qui permet d'exécuter des commandes <a href="Ruby" title="Ruby">Ruby</a> de manière <a href="Interactivit%C3%A9" title="Interactivité">interactive</a>.
Il peut être utilisé pour tester le <a href="Langage_de_programmation" title="Langage de programmation">langage</a>.
Il est fourni avec la version officielle de <a href="Ruby" title="Ruby">Ruby</a>.
Une version existe également sur le <a href="Web" class="mw-redirect" title="Web">Web</a><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>.
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<div class="mw-heading mw-heading2"><h2 id="Exemple_d'utilisation"><span id="Exemple_d.27utilisation"></span>Exemple d'utilisation</h2></div>
<pre>irb(main):001:0> n = 5
=> 5
irb(main):002:0> def fact(n)
irb(main):003:1> if n <= 1
irb(main):004:2> 1
irb(main):005:2> else
irb(main):006:2* n * fact(n - 1)
irb(main):007:2> end
irb(main):008:1> end
=> nil
irb(main):009:0> fact(n)
=> 120
</pre>
<div class="mw-heading mw-heading2"><h2 id="Voir_aussi">Voir aussi</h2></div>
<ul><li><a href="Ruby" title="Ruby">Ruby</a></li>
<li><a href="Interpr%C3%A9teur_de_commandes" title="Interpréteur de commandes">Interpréteur de commandes</a></li></ul>
<div class="mw-heading mw-heading2"><h2 id="Liens_externes">Liens externes</h2></div>
<ul><li><abbr class="abbr indicateur-langue" title="Langue : anglais">(en)</abbr> <a rel="nofollow" class="external text" href="http://www.rubycentral.com/book/trouble.html">Chapitre "When Trouble Strikes"</a> du livre <i>Programming Ruby</i></li>
<li><abbr class="abbr indicateur-langue" title="Langue : anglais">(en)</abbr> <a rel="nofollow" class="external text" href="http://www.rubycentral.com/book/irb.html">Chapitre "Interactive Ruby Shell"</a> du livre <i>Programming Ruby</i></li></ul>
<div class="mw-heading mw-heading2"><h2 id="Notes_et_références"><span id="Notes_et_r.C3.A9f.C3.A9rences"></span>Notes et références</h2></div>
<div class="references-small decimal" style=""><div class="mw-references-wrap"><ol class="references">
<li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a> </span><span class="reference-text"><abbr class="abbr indicateur-langue" title="Langue : anglais">(en)</abbr> <a rel="nofollow" class="external text" href="http://tryruby.org/">Try Ruby! (in your browser)</a></span>
</li>
</ol></div>
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