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<!DOCTYPE html>
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<p class="caption"><span class="caption-text">Table of Contents:</span></p>
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<li class="toctree-l1"><a class="reference internal" href="../../intro.html">Python Like You Mean It</a></li>
<li class="toctree-l1"><a class="reference internal" href="../../module_1.html">Module 1: Getting Started with Python</a></li>
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<div class="section" id="Exercises">
<h1>Exercises<a class="headerlink" href="#Exercises" title="Permalink to this headline">¶</a></h1>
<div class="section" id="Checking-Python-Version-(not-graded)">
<h2>Checking Python Version (not graded)<a class="headerlink" href="#Checking-Python-Version-(not-graded)" title="Permalink to this headline">¶</a></h2>
<p>Run</p>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">sys</span>
</pre></div>
</div>
<p>and then</p>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="nb">print</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">version</span><span class="p">)</span>
</pre></div>
</div>
<p>to confirm you have Python 3.5 (or greater).</p>
</div>
<div class="section" id="Slicing-Strings-(not-graded)">
<h2>Slicing Strings (not graded)<a class="headerlink" href="#Slicing-Strings-(not-graded)" title="Permalink to this headline">¶</a></h2>
<p>Create a variable, <code class="docutils literal notranslate"><span class="pre">x</span></code>, with the string value <code class="docutils literal notranslate"><span class="pre">"I'm</span> <span class="pre">a</span> <span class="pre">string,</span> <span class="pre">hear</span> <span class="pre">me</span> <span class="pre">roar!"</span></code> assigned to it. Now print out the last 13 characters contained in <code class="docutils literal notranslate"><span class="pre">x</span></code> via slicing.</p>
</div>
<div class="section" id="Constructing-a-List-(not-graded)">
<h2>Constructing a List (not graded)<a class="headerlink" href="#Constructing-a-List-(not-graded)" title="Permalink to this headline">¶</a></h2>
<p>Create an empty list, <code class="docutils literal notranslate"><span class="pre">x</span> <span class="pre">=</span> <span class="pre">[]</span></code>. Using - a <code class="docutils literal notranslate"><span class="pre">while</span></code> loop - the list-method <code class="docutils literal notranslate"><span class="pre">append</span></code> - the built-in function <code class="docutils literal notranslate"><span class="pre">len</span></code> append numbers to <code class="docutils literal notranslate"><span class="pre">x</span></code> until it contains 0-9: <code class="docutils literal notranslate"><span class="pre">[0,</span> <span class="pre">1,</span> <span class="pre">2,</span> <span class="pre">3,</span> <span class="pre">4,</span> <span class="pre">5,</span> <span class="pre">6,</span> <span class="pre">7,</span> <span class="pre">8,</span> <span class="pre">9]</span></code>.</p>
<blockquote>
<div><p>WARNING: if you give the while-loop a condition that never evaluates to False then your code will run forever. If this happens, at the top of your Jupyter notebook go to Kernel and then click Interrupt. If you are in the IPython shell, hit CTRL-C or close the terminal.</p>
</div></blockquote>
<p><strong>Bonus</strong>: accomplish this without using any variables, other than <code class="docutils literal notranslate"><span class="pre">x</span></code>.</p>
<blockquote>
<div><p>Note that there are much simpler ways to construct a list of numbers than by appending to one in a while loop. For instance, one can use list comprehensions. We will learn about these later.</p>
</div></blockquote>
</div>
<div class="section" id="Slicing-a-List-(not-graded)">
<h2>Slicing a List (not graded)<a class="headerlink" href="#Slicing-a-List-(not-graded)" title="Permalink to this headline">¶</a></h2>
<p>Given <code class="docutils literal notranslate"><span class="pre">x</span> <span class="pre">=</span> <span class="pre">[1,</span> <span class="pre">2,</span> <span class="pre">3,</span> <span class="pre">4,</span> <span class="pre">5]</span></code>, predict the output following sliced lists. Try rewriting any negative indices using the appropriate positive indices.</p>
<ul class="simple">
<li><p><code class="docutils literal notranslate"><span class="pre">x[-3:]</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">x[-3:2]</span></code></p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">x[-6:4]</span></code></p></li>
</ul>
</div>
<div class="section" id="Operating-on-Various-Data-Types-(not-graded)">
<h2>Operating on Various Data Types (not graded)<a class="headerlink" href="#Operating-on-Various-Data-Types-(not-graded)" title="Permalink to this headline">¶</a></h2>
<p>Why can Python calculate <code class="docutils literal notranslate"><span class="pre">1</span> <span class="pre">+</span> <span class="pre">1</span></code> and <code class="docutils literal notranslate"><span class="pre">'1'</span> <span class="pre">+</span> <span class="pre">'1'</span></code> but not <code class="docutils literal notranslate"><span class="pre">'1'</span> <span class="pre">+</span> <span class="pre">1</span></code>?</p>
</div>
<div class="section" id="Doing-Simple-Arithmetic-(not-graded)">
<h2>Doing Simple Arithmetic (not graded)<a class="headerlink" href="#Doing-Simple-Arithmetic-(not-graded)" title="Permalink to this headline">¶</a></h2>
<p>Given a, b, and c calculate and print the two solutions to the quadratic equation using the quadratic formula.</p>
<blockquote>
<div><p>(Use <code class="docutils literal notranslate"><span class="pre">x**.5</span></code> to take the square root of an expression)</p>
</div></blockquote>
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