 <p>Hitting <code>CTRL-C</code> tells Powershell to stop the execution of the program, yielding a <code>KeyboardInterrupt</code> error.</p> <p>A comment in the program mentions the following:</p> <p><code># Keep going until they hit CTRL-D</code></p> <p>Meaning you'll have to exit with <code>CTRL-D</code>. That doesn't seem to work, so exiting with <code>CTRL-C</code> is logical. The program is broken at the line</p> <pre><code>question, answer = convert(snippet, phrase) </code></pre> <p>because we both got the same errors.</p> <p>I've personally quit following the tutorial around Ex.25. Examing projects written in Python is far more effective because you can research the functions that the programmer/developer used for the project.</p>