title: How to turn uppercase to lowercase using the charAt method?
body: <p>I need to create a function that will make all uppercase characters lowercase using the <code>charAt</code> method. I've tried to use typecasting to change the <code>int</code> values to <code>char</code> but got lost after that.</p>
  
  <pre><code>/********************************************************************************
    This function will calculate the integer average of characters in the array
  ********************************************************************************/
  public static void lowerCase(char[] letter) {
      char mean;
      mean = (char) ((int) ch + 32);
  }
  </code></pre>