title: Check if a character is lowerCase or upperCase
body: <p>I am trying to make a program that stores a string in a variable called <code>input</code>. </p>
  
  <p>With this <code>input</code> variable, I am then trying to convert it to an array, and then test with a for loop whether each character in the array is lowerCase or not. How can I achieve this? </p>
  
  <p>Here is how far I have gotten:</p>
  
  <pre><code>var input = "The quick BroWn fOX jumpS Over tHe lazY DOg"
  
  var inputArray = Array(input)
  
  for character in inputArray {
      /*
  
      if character is lower case {
  
          make it uppercase
  
      } else {
  
          make it lowercase
  
      }
  
      */
  }
  </code></pre>