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    <title>변환 on Sobamemil</title>
    <link>https://blog.sobamemil.com/en/tags/%EB%B3%80%ED%99%98/</link>
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      <title>[Swift] Swapping Upper and Lowercase - Programmers Lv.0 (181949)</title>
      <link>https://blog.sobamemil.com/en/posts/189-swift-%EB%8C%80%EC%86%8C%EB%AC%B8%EC%9E%90-%EB%B0%94%EA%BF%94%EC%84%9C-%EC%B6%9C%EB%A0%A5%ED%95%98%EA%B8%B0-lv0-181949-%ED%94%84%EB%A1%9C%EA%B7%B8%EB%9E%98%EB%A8%B8%EC%8A%A4/</link>
      <pubDate>Mon, 19 Jun 2023 21:45:07 +0900</pubDate>
      <guid>https://blog.sobamemil.com/en/posts/189-swift-%EB%8C%80%EC%86%8C%EB%AC%B8%EC%9E%90-%EB%B0%94%EA%BF%94%EC%84%9C-%EC%B6%9C%EB%A0%A5%ED%95%98%EA%B8%B0-lv0-181949-%ED%94%84%EB%A1%9C%EA%B7%B8%EB%9E%98%EB%A8%B8%EC%8A%A4/</guid>
      <description>&lt;p&gt;&lt;b&gt;Problem:&lt;/b&gt;&lt;/p&gt;
&lt;p&gt;영어 알파벳으로 이루어진 문자열 str이 주어집니다.&lt;/p&gt;
&lt;p&gt;각 알파벳을 대문자는 소문자로 소문자는 대문자로 변환해서 출력하는 코드를 작성해 보세요.&lt;/p&gt;
&lt;p&gt;&lt;a href=&#34;https://school.programmers.co.kr/learn/courses/30/lessons/181949&#34;&gt;https://school.programmers.co.kr/learn/courses/30/lessons/181949&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;Constraints:&lt;/b&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;1 ≤ str의 길이 ≤ 20
&lt;ul&gt;
&lt;li&gt;str은 알파벳으로 이루어진 문자열입니다.&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;&lt;b&gt;Solution:&lt;/b&gt;&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre tabindex=&#34;0&#34; style=&#34;color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;&#34;&gt;&lt;code class=&#34;language-cpp&#34; data-lang=&#34;cpp&#34;&gt;&lt;span style=&#34;display:flex;&#34;&gt;&lt;span&gt;let line &lt;span style=&#34;color:#f92672&#34;&gt;=&lt;/span&gt; readLine()&lt;span style=&#34;color:#f92672&#34;&gt;!&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span style=&#34;display:flex;&#34;&gt;&lt;span&gt;let resultString &lt;span style=&#34;color:#f92672&#34;&gt;=&lt;/span&gt; line.map { character in
&lt;/span&gt;&lt;/span&gt;&lt;span style=&#34;display:flex;&#34;&gt;&lt;span&gt;    &lt;span style=&#34;color:#66d9ef&#34;&gt;if&lt;/span&gt; character.isLowercase {
&lt;/span&gt;&lt;/span&gt;&lt;span style=&#34;display:flex;&#34;&gt;&lt;span&gt;        &lt;span style=&#34;color:#66d9ef&#34;&gt;return&lt;/span&gt; character.uppercased()
&lt;/span&gt;&lt;/span&gt;&lt;span style=&#34;display:flex;&#34;&gt;&lt;span&gt;    } &lt;span style=&#34;color:#66d9ef&#34;&gt;else&lt;/span&gt; {
&lt;/span&gt;&lt;/span&gt;&lt;span style=&#34;display:flex;&#34;&gt;&lt;span&gt;        &lt;span style=&#34;color:#66d9ef&#34;&gt;return&lt;/span&gt; character.lowercased()
&lt;/span&gt;&lt;/span&gt;&lt;span style=&#34;display:flex;&#34;&gt;&lt;span&gt;    }
&lt;/span&gt;&lt;/span&gt;&lt;span style=&#34;display:flex;&#34;&gt;&lt;span&gt;}.joined()
&lt;/span&gt;&lt;/span&gt;&lt;span style=&#34;display:flex;&#34;&gt;&lt;span&gt;print(resultString)
&lt;/span&gt;&lt;/span&gt;&lt;span style=&#34;display:flex;&#34;&gt;&lt;span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span style=&#34;display:flex;&#34;&gt;&lt;span&gt;&lt;span style=&#34;color:#75715e&#34;&gt;// 또는
&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span style=&#34;display:flex;&#34;&gt;&lt;span&gt;&lt;span style=&#34;color:#75715e&#34;&gt;// print(readLine()?.map { $0.isLowercase ? $0.uppercased() : $0.lowercased() }.joined() ?? &amp;#34;&amp;#34;)
&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;입력 받은 각 문자 하나하나가 대문자인지 소문자인지 판단해서 반대로 출력하면 되는 문제입니다.&lt;/p&gt;</description>
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