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Tutur33
123 lines
4.8 KiB
HTML
123 lines
4.8 KiB
HTML
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<html>
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<h1 id="topic_header_text">L'instruction if</h1>
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<a href="Lesconditionsinstructionsifelife.html">Les conditions (instructions if, elif, else)</a> ››
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<p></p>
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<h3 class="rvps12"><img alt="" style="padding : 1px;" src="lib/NouvelElement30.png"></h3>
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<h4 class="rvps13"><span class="rvts0"><span class="rvts59">Syntaxe</span></span></h4>
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<p class="rvps8"><span class="rvts46">if</span><span class="rvts38"> expression: </span><span class="rvts39"># ne pas oublier le signe de ponctuation ':'</span><br/><span class="rvts75"> </span><span class="rvts38">bloc d'instructions </span><span class="rvts39"># attention à l'indentation</span><br/><span class="rvts39"># suite du programme</span></p>
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<p class="rvps7"><span class="rvts11">Si l'expression est vraie (</span><span class="rvts12">True</span><span class="rvts11">) alors le bloc d'instructions est exécuté.</span><br/><span class="rvts11">Si l'expression est fausse (</span><span class="rvts12">False</span><span class="rvts11">) on passe directement à la suite du programme.</span></p>
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<p class="rvps7"><span class="rvts11">Nous allons commencer par créer le script </span><span class="rvts17">Condition1.py</span><span class="rvts11"> :</span></p>
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<p class="rvps7"><img alt="" style="padding : 1px;" src="lib/NouvelElement23.png"></p>
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<p class="rvps8"><span class="rvts39"># script Condition1.py</span><br/><span class="rvts38">chaine = </span><span class="rvts40">input</span><span class="rvts38">(</span><span class="rvts52">"Note sur 20 : "</span><span class="rvts38">)</span><br/><span class="rvts38">note = </span><span class="rvts40">float</span><span class="rvts38">(chaine)</span><br/><span class="rvts46">if</span><span class="rvts38"> note >= 10.0:</span><br/><span class="rvts38"> </span><span class="rvts39"># ce bloc est exécuté si l'expression (note >= 10.0) est vraie</span><br/><span class="rvts38"> </span><span class="rvts40">print</span><span class="rvts52">("J'ai la moyenne")</span><br/><span class="rvts40">print</span><span class="rvts52">("Fin du programme")</span></p>
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<p class="rvps7"><span class="rvts11">Pour exécuter le script :</span><br/><span class="rvts11">Cliquer sur exécuter </span><img alt="" style="padding : 1px;" src="lib/NouvelElement7.png"><span class="rvts11"> (ou touche Ctrl + F9) et tester.</span></p>
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<h3 class="rvps12"><span class="rvts0"><span class="rvts74"><br/></span></span></h3>
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<p></p>
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<p class="rvps4" style="clear: both;"><span class="rvts15">Créé avec HelpNDoc Personal Edition: </span><a class="rvts16" href="https://www.helpndoc.com/fr/tour-des-fonctionnalites">Créer facilement des fichiers Qt Help</a></p>
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