title: Define a function isVowel(char) that returns True if char is a vowel ('a', 'e', 'i', 'o', or 'u'), and False otherwise
body: <p><strong>Question:</strong></p>
  
  <p>Define a function isVowel(char) that returns True if char is a vowel ('a', 'e', 'i', 'o', or 'u'), and False otherwise. You can assume that char is a single letter of any case (ie, 'A' and 'a' are both valid).</p>
  
  <p>Do not use the keyword in. Your function should take in a single string and return a boolean.</p>
  
  <p><strong>Code Given:</strong></p>
  
  <pre><code>def isVowel(char):
      '''
      char: a single letter of any case
  
      returns: True if char is a vowel and False otherwise.
      '''
  </code></pre>
  
  <p><strong>My Code:</strong></p>
  
  <pre><code>def isVowel(char):
      '''
      char: a single letter of any case
  
      returns: True if char is a vowel and False otherwise.
      '''
      if char == 'a' or 'e' or 'i' or 'o' or 'u' or 'A' or 'E' or 'I' or 'O' or 'U':
          return True
      else:
          return False
  </code></pre>
  
  <p><strong>My Problem:</strong>
  My output is always True. What am I doing wrong?</p>