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121 lines
3.7 KiB
HTML
121 lines
3.7 KiB
HTML
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8" />
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<meta name="author" content="Fredrik Danielsson, http://lostkeys.se">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta name="robots" content="noindex" />
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<title>Brandon Rozek</title>
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<link rel="stylesheet" href="themes/bitsandpieces/styles/main.css" type="text/css" />
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<link rel="stylesheet" href="themes/bitsandpieces/styles/highlightjs-github.css" type="text/css" />
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</head>
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<body>
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<aside class="main-nav">
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<nav>
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<ul>
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<li class="menuitem ">
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<a href="index.html%3Findex.html" data-shortcut="">
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Home
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</a>
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</li>
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<li class="menuitem ">
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<a href="index.html%3Fcourses.html" data-shortcut="">
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Courses
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</a>
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</li>
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<li class="menuitem ">
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<a href="index.html%3Flabaide.html" data-shortcut="">
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Lab Aide
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</a>
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</li>
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<li class="menuitem ">
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<a href="index.html%3Fpresentations.html" data-shortcut="">
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Presentations
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</a>
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</li>
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<li class="menuitem ">
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<a href="index.html%3Fresearch.html" data-shortcut="">
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Research
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</a>
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</li>
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<li class="menuitem ">
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<a href="index.html%3Ftranscript.html" data-shortcut="">
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Transcript
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</a>
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</li>
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</ul>
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</nav>
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</aside>
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<main class="main-content">
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<article class="article">
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<h1>Lecture for February 1st</h1>
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<h2>Control Structures</h2>
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<p>In this class we will talk about three types of control structures</p>
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<ul>
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<li>Sequential</li>
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<li>Selection</li>
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<li>Repetition</li>
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</ul>
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<p>Sequential is what is most familiar to us. Write the lines from top to bottom and it executes it in that order</p>
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<h3>Selection</h3>
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<p>Selection depends on the question of <code>if</code>. </p>
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<p>If it is raining, wear boots</p>
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<pre><code class="language-java">if (raining) {
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wearingBoots = true;
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}</code></pre>
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<p>If you want something to happen also when it is not true, consider an <code>if-else</code> statement</p>
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<p>If the light is off, turn it on.</p>
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<p>Otherwise, turn it on</p>
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<pre><code class="language-java">if (lightIsOn) {
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lightIsOn = false;
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} else {
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lightIsOn = true;
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}</code></pre>
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<p>Sometimes you can have multiple branches depending on a condition. Let us take a stop light as an example</p>
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<pre><code class="language-java">if (light == "red") {
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car.stop()
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} else if (light == "yellow") {
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car.slow()
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} else {
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car.go()
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}</code></pre>
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<h2>String comparison</h2>
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<p>There is a specific method in the <code>String</code> class when it comes to checking for string equality</p>
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<pre><code class="language-java">boolean equals(String s)</code></pre>
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<p>Let us look at an example</p>
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<pre><code class="language-java">String word = "hello";
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boolean ans = word.equals("hello"); // Returns true
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boolean ans2 = word.equals("Hello"); // Returns false</code></pre>
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</article>
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</main>
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</body>
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</html>
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