Hello again all. Trying to learn this again and just have a question of where the value is being used/stored in the code below. Yes, it's the same Chapter 4 question 1 that I complained about before but now I have actually taken my time and understand chapter 1-3 :)

function checkCharType(charToCheck)
{
   var returnValue = "O";
   var charCode = charToCheck.charCodeAt(0);

   if (charCode >= "A".charCodeAt(0) && charCode <= "Z".charCodeAt(0))
   {
      returnValue = "U";
   }
   else if (charCode >= "a".charCodeAt(0) && charCode <= "z".charCodeAt(0))
   {
      returnValue = "L";
   }
   else if (charCode >= "0".charCodeAt(0) && charCode <= "9".charCodeAt(0))
   {
      returnValue = "N";
   }
   return returnValue;
}

var myString = prompt("Enter some text","Hello World!");
switch (checkCharType(myString))
{
   case "U":
      document.write("First character was upper case");
      break;
   case "L":
      document.write("First character was lower case");
      break;
   case "N":
      document.write("First character was a number");
      break;
   default:
      document.write("First character was not a character or a number");
}

I left out the top tags to save space. I totally understand how this is working for the most part but my question is this. Our checkCharType function is getting a value and returning it in the "returnValue" variable. But where exactly is it returning it to? I don't see any reference of that again in the code. I realize it is getting passed down to the switch statement to check against myString but I'm unclear about where it goes. Sorry for the dumb question but it's the little things like this that get me hung up. Thanks in advance.

Would it make more sense if it read:
var theReturnValue = checkCharType(myString);
switch (theReturnValue)
{
...

That's all its doing - using the return value for the switch statement only, then its discarded. If you like you can think of JS creating a temporary variable in memory containing the return value.

hth
Phil

Hey thanks a million Phil - that totally helps out. Much appreciated.