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15 lines
2.1 KiB
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<html><body><div class="content"><div class="section" id="the-if-statement">
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<span id="else"></span><span id="elif"></span><span id="if"></span><h2>The <a class="reference internal" href="#if"><tt class="xref std std-keyword docutils literal"><span class="pre">if</span></tt></a> statement</h2>
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<p id="index-3">The <a class="reference internal" href="#if"><tt class="xref std std-keyword docutils literal"><span class="pre">if</span></tt></a> statement is used for conditional execution:</p>
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<pre>
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<strong id="grammar-token-if_stmt">if_stmt</strong> ::= "if" <a class="reference internal" href="expressions.html#grammar-token-expression"><tt class="xref docutils literal"><span class="pre">expression</span></tt></a> ":" <a class="reference internal" href="#grammar-token-suite"><tt class="xref docutils literal"><span class="pre">suite</span></tt></a>
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( "elif" <a class="reference internal" href="expressions.html#grammar-token-expression"><tt class="xref docutils literal"><span class="pre">expression</span></tt></a> ":" <a class="reference internal" href="#grammar-token-suite"><tt class="xref docutils literal"><span class="pre">suite</span></tt></a> )*
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["else" ":" <a class="reference internal" href="#grammar-token-suite"><tt class="xref docutils literal"><span class="pre">suite</span></tt></a>]
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</pre>
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<p>It selects exactly one of the suites by evaluating the expressions one by one
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until one is found to be true (see section <a class="reference internal" href="expressions.html#booleans"><em>Boolean operations</em></a> for the definition of
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true and false); then that suite is executed (and no other part of the
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<a class="reference internal" href="#if"><tt class="xref std std-keyword docutils literal"><span class="pre">if</span></tt></a> statement is executed or evaluated). If all expressions are
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false, the suite of the <a class="reference internal" href="#else"><tt class="xref std std-keyword docutils literal"><span class="pre">else</span></tt></a> clause, if present, is executed.</p>
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</div>
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</div></body></html> |